m4a lib; use fewer iwram syms

24 files changed, 5069 insertions, 5478 deletions

diff --git a/.gitattributes b/.gitattributes
index 10b00f541..5229f0d3f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -7,6 +7,7 @@ Makefile text eol=lf
 *.c text eol=lf
 *.h text eol=lf
 *.pl text eol=lf
+*.inc text eol=lf
 
 *.png binary
 *.bin binary
diff --git a/.gitignore b/.gitignore
index f144a1aba..ee1909710 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@ pokeas
 pokeld
 pokeobjcopy
 src/*.s
+tools/agbcc
diff --git a/Makefile b/Makefile
index 7b16e1688..2489b46a9 100644
--- a/Makefile
+++ b/Makefile
@@ -36,9 +36,9 @@ C_SRCS := $(wildcard src/*.c)
 C_OBJS := $(C_SRCS:%.c=%.o)
 
 ASM_OBJS := asm/crt0.o asm/rom1.o asm/rom2.o asm/rom3.o asm/rom4.o asm/rom5.o \
-	asm/libgcnmultiboot.o asm/libmks4agb.o asm/libagbsyscall.o asm/libc.o
+	asm/libgcnmultiboot.o asm/m4a_1.o asm/m4a_3.o asm/libagbsyscall.o asm/libc.o
 
-DATA_ASM_OBJS := data/data1.o data/data2.o data/graphics.o
+DATA_ASM_OBJS := data/data1.o data/data2.o data/graphics.o data/sound_data.o
 
 OBJS := $(C_OBJS) $(ASM_OBJS) $(DATA_ASM_OBJS)
 
@@ -72,6 +72,9 @@ src/agb_flash.o: CFLAGS := -O -mthumb-interwork
 src/agb_flash_1m.o: CFLAGS := -O -mthumb-interwork
 src/agb_flash_mx.o: CFLAGS := -O -mthumb-interwork
 
+src/m4a_2.o: CC1 := tools/agbcc/bin/old_agbcc
+src/m4a_4.o: CC1 := tools/agbcc/bin/old_agbcc
+
 $(C_OBJS): %.o : %.c
 	$(CPP) $(CPPFLAGS) $< | $(CC1) $(CFLAGS) -o $*.s
 	echo -e ".text\n\t.align\t2, 0\n" >> $*.s
diff --git a/asm/libmks4agb.s b/asm/libmks4agb.s
deleted file mode 100644
index 545660669..000000000
--- a/asm/libmks4agb.s
+++ /dev/null
@@ -1,5292 +0,0 @@
-	.include "asm/macros.s"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start umul3232H32
-umul3232H32: @ 81DCE14
-	adr r2, _081DCE18
-	bx r2
-	.arm
-_081DCE18:
-	umull r2, r3, r0, r1
-	add r0, r3, 0
-	bx lr
-	thumb_func_end umul3232H32
-
-	thumb_func_start SoundMain
-SoundMain: @ 81DCE24
-	ldr r0, _081DCE90
-	ldr r0, [r0]
-	ldr r2, _081DCE94
-	ldr r3, [r0]
-	cmp r2, r3
-	beq _081DCE32
-	bx lr
-_081DCE32:
-	adds r3, 0x1
-	str r3, [r0]
-	push {r4-r7,lr}
-	mov r1, r8
-	mov r2, r9
-	mov r3, r10
-	mov r4, r11
-	push {r0-r4}
-	sub sp, 0x18
-	ldrb r1, [r0, 0xC]
-	cmp r1, 0
-	beq _081DCE56
-	ldr r2, _081DCE9C
-	ldrb r2, [r2]
-	cmp r2, 0xA0
-	bcs _081DCE54
-	adds r2, 0xE4
-_081DCE54:
-	adds r1, r2
-_081DCE56:
-	str r1, [sp, 0x14]
-	ldr r3, [r0, 0x20]
-	cmp r3, 0
-	beq _081DCE66
-	ldr r0, [r0, 0x24]
-	bl _081DD25E
-	ldr r0, [sp, 0x18]
-_081DCE66:
-	ldr r3, [r0, 0x28]
-	bl _081DD25E
-	ldr r0, [sp, 0x18]
-	ldr r3, [r0, 0x10]
-	mov r8, r3
-	ldr r5, _081DCEA0
-	adds r5, r0
-	ldrb r4, [r0, 0x4]
-	subs r7, r4, 0x1
-	bls _081DCE86
-	ldrb r1, [r0, 0xB]
-	subs r1, r7
-	mov r2, r8
-	muls r2, r1
-	adds r5, r2
-_081DCE86:
-	str r5, [sp, 0x8]
-	ldr r6, _081DCEA4
-	ldr r3, _081DCE98
-	bx r3
-	.align 2, 0
-_081DCE90: .4byte 0x03007ff0
-_081DCE94: .4byte 0x68736d53
-_081DCE98: .4byte 0x03000f61
-_081DCE9C: .4byte 0x04000006
-_081DCEA0: .4byte 0x00000350
-_081DCEA4: .4byte 0x00000630
-	thumb_func_end SoundMain
-
-	thumb_func_start SoundMainRAM
-SoundMainRAM: @ 81DCEA8
-	ldrb r3, [r0, 0x5]
-	cmp r3, 0
-	beq _081DCF08
-	adr r1, _081DCEB4
-	bx r1
-	.arm
-_081DCEB4:
-	cmp r4, 0x2
-	addeq r7, r0, 0x350
-	addne r7, r5, r8
-	mov r4, r8
-_081DCEC4:
-	ldrsb r0, [r5, r6]
-	ldrsb r1, [r5]
-	add r0, r0, r1
-	ldrsb r1, [r7, r6]
-	add r0, r0, r1
-	ldrsb r1, [r7], 0x1
-	add r0, r0, r1
-	mul r1, r0, r3
-	mov r0, r1, asr 9
-	tst r0, 0x80
-	addne r0, r0, 0x1
-	strb r0, [r5, r6]
-	strb r0, [r5], 0x1
-	subs r4, r4, 0x1
-	bgt _081DCEC4
-	add r0, pc, 0x2F
-	bx r0
-	.thumb
-_081DCF08:
-	movs r0, 0
-	mov r1, r8
-	adds r6, r5
-	lsrs r1, 3
-	bcc _081DCF16
-	stm r5!, {r0}
-	stm r6!, {r0}
-_081DCF16:
-	lsrs r1, 1
-	bcc _081DCF22
-	stm r5!, {r0}
-	stm r6!, {r0}
-	stm r5!, {r0}
-	stm r6!, {r0}
-_081DCF22:
-	stm r5!, {r0}
-	stm r6!, {r0}
-	stm r5!, {r0}
-	stm r6!, {r0}
-	stm r5!, {r0}
-	stm r6!, {r0}
-	stm r5!, {r0}
-	stm r6!, {r0}
-	subs r1, 0x1
-	bgt _081DCF22
-	ldr r4, [sp, 0x18]
-	ldr r0, [r4, 0x18]
-	mov r12, r0
-	ldrb r0, [r4, 0x6]
-	adds r4, 0x50
-_081DCF40:
-	str r0, [sp, 0x4]
-	ldr r3, [r4, 0x24]
-	ldr r0, [sp, 0x14]
-	cmp r0, 0
-	beq _081DCF60
-	ldr r1, _081DCF5C
-	ldrb r1, [r1]
-	cmp r1, 0xA0
-	bcs _081DCF54
-	adds r1, 0xE4
-_081DCF54:
-	cmp r1, r0
-	bcc _081DCF60
-	b _081DD24A
-	.align 2, 0
-_081DCF5C: .4byte 0x04000006
-_081DCF60:
-	ldrb r6, [r4]
-	movs r0, 0xC7
-	tst r0, r6
-	bne _081DCF6A
-	b _081DD240
-_081DCF6A:
-	movs r0, 0x80
-	tst r0, r6
-	beq _081DCFA0
-	movs r0, 0x40
-	tst r0, r6
-	bne _081DCFB0
-	movs r6, 0x3
-	strb r6, [r4]
-	adds r0, r3, 0
-	adds r0, 0x10
-	ldr r1, [r4, 0x18]
-	adds r0, r1
-	str r0, [r4, 0x28]
-	ldr r0, [r3, 0xC]
-	subs r0, r1
-	str r0, [r4, 0x18]
-	movs r5, 0
-	strb r5, [r4, 0x9]
-	str r5, [r4, 0x1C]
-	ldrb r2, [r3, 0x3]
-	movs r0, 0xC0
-	tst r0, r2
-	beq _081DCFF8
-	movs r0, 0x10
-	orrs r6, r0
-	strb r6, [r4]
-	b _081DCFF8
-_081DCFA0:
-	ldrb r5, [r4, 0x9]
-	movs r0, 0x4
-	tst r0, r6
-	beq _081DCFB6
-	ldrb r0, [r4, 0xD]
-	subs r0, 0x1
-	strb r0, [r4, 0xD]
-	bhi _081DD006
-_081DCFB0:
-	movs r0, 0
-	strb r0, [r4]
-	b _081DD240
-_081DCFB6:
-	movs r0, 0x40
-	tst r0, r6
-	beq _081DCFD6
-	ldrb r0, [r4, 0x7]
-	muls r5, r0
-	lsrs r5, 8
-	ldrb r0, [r4, 0xC]
-	cmp r5, r0
-	bhi _081DD006
-_081DCFC8:
-	ldrb r5, [r4, 0xC]
-	cmp r5, 0
-	beq _081DCFB0
-	movs r0, 0x4
-	orrs r6, r0
-	strb r6, [r4]
-	b _081DD006
-_081DCFD6:
-	movs r2, 0x3
-	ands r2, r6
-	cmp r2, 0x2
-	bne _081DCFF4
-	ldrb r0, [r4, 0x5]
-	muls r5, r0
-	lsrs r5, 8
-	ldrb r0, [r4, 0x6]
-	cmp r5, r0
-	bhi _081DD006
-	adds r5, r0, 0
-	beq _081DCFC8
-	subs r6, 0x1
-	strb r6, [r4]
-	b _081DD006
-_081DCFF4:
-	cmp r2, 0x3
-	bne _081DD006
-_081DCFF8:
-	ldrb r0, [r4, 0x4]
-	adds r5, r0
-	cmp r5, 0xFF
-	bcc _081DD006
-	movs r5, 0xFF
-	subs r6, 0x1
-	strb r6, [r4]
-_081DD006:
-	strb r5, [r4, 0x9]
-	ldr r0, [sp, 0x18]
-	ldrb r0, [r0, 0x7]
-	adds r0, 0x1
-	muls r0, r5
-	lsrs r5, r0, 4
-	ldrb r0, [r4, 0x2]
-	muls r0, r5
-	lsrs r0, 8
-	strb r0, [r4, 0xA]
-	ldrb r0, [r4, 0x3]
-	muls r0, r5
-	lsrs r0, 8
-	strb r0, [r4, 0xB]
-	movs r0, 0x10
-	ands r0, r6
-	str r0, [sp, 0x10]
-	beq _081DD03A
-	adds r0, r3, 0
-	adds r0, 0x10
-	ldr r1, [r3, 0x8]
-	adds r0, r1
-	str r0, [sp, 0xC]
-	ldr r0, [r3, 0xC]
-	subs r0, r1
-	str r0, [sp, 0x10]
-_081DD03A:
-	ldr r5, [sp, 0x8]
-	ldr r2, [r4, 0x18]
-	ldr r3, [r4, 0x28]
-	adr r0, _081DD044
-	bx r0
-	.arm
-_081DD044:
-	str r8, [sp]
-	ldr r9, [r4, 0x1C]
-	ldrb r10, [r4, 0xA]
-	ldrb r11, [r4, 0xB]
-	ldrb r0, [r4, 0x1]
-	tst r0, 0x30
-	beq _081DD068
-	bl sub_81DD264
-	b _081DD228
-_081DD068:
-	mov r10, r10, lsl 16
-	mov r11, r11, lsl 16
-	ldrb r0, [r4, 0x1]
-	tst r0, 0x8
-	beq _081DD19C
-_081DD07C:
-	cmp r2, 0x4
-	ble _081DD0EC
-	subs r2, r2, r8
-	movgt r9, 0
-	bgt _081DD0A8
-	mov r9, r8
-	add r2, r2, r8
-	sub r8, r2, 0x4
-	sub r9, r9, r8
-	ands r2, r2, 0x3
-	moveq r2, 0x4
-_081DD0A8:
-	ldr r6, [r5]
-	ldr r7, [r5, 0x630]
-_081DD0B0:
-	ldrsb r0, [r3], 0x1
-	mul r1, r10, r0
-	bic r1, r1, 0xFF0000
-	add r6, r1, r6, ror 8
-	mul r1, r11, r0
-	bic r1, r1, 0xFF0000
-	add r7, r1, r7, ror 8
-	adds r5, r5, 0x40000000
-	bcc _081DD0B0
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	subs r8, r8, 0x4
-	bgt _081DD0A8
-	adds r8, r8, r9
-	beq _081DD22C
-_081DD0EC:
-	ldr r6, [r5]
-	ldr r7, [r5, 0x630]
-_081DD0F4:
-	ldrsb r0, [r3], 0x1
-	mul r1, r10, r0
-	bic r1, r1, 0xFF0000
-	add r6, r1, r6, ror 8
-	mul r1, r11, r0
-	bic r1, r1, 0xFF0000
-	add r7, r1, r7, ror 8
-	subs r2, r2, 0x1
-	beq _081DD164
-_081DD118:
-	adds r5, r5, 0x40000000
-	bcc _081DD0F4
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	subs r8, r8, 0x4
-	bgt _081DD07C
-	b _081DD22C
-_081DD134:
-	ldr r0, [sp, 0x18]
-	cmp r0, 0
-	beq _081DD158
-	ldr r3, [sp, 0x14]
-	rsb lr, r2, 0
-_081DD148:
-	adds r2, r0, r2
-	bgt _081DD1FC
-	sub lr, lr, r0
-	b _081DD148
-_081DD158:
-	ldmia sp!, {r4,r12}
-	mov r2, 0
-	b _081DD174
-_081DD164:
-	ldr r2, [sp, 0x10]
-	cmp r2, 0
-	ldrne r3, [sp, 0xC]
-	bne _081DD118
-_081DD174:
-	strb r2, [r4]
-	mov r0, r5, lsr 30
-	bic r5, r5, 0xC0000000
-	rsb r0, r0, 0x3
-	mov r0, r0, lsl 3
-	mov r6, r6, ror r0
-	mov r7, r7, ror r0
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	b _081DD234
-_081DD19C:
-	stmdb sp!, {r4,r12}
-	ldr r1, [r4, 0x20]
-	mul r4, r12, r1
-	ldrsb r0, [r3]
-	ldrsb r1, [r3, 0x1]!
-	sub r1, r1, r0
-_081DD1B4:
-	ldr r6, [r5]
-	ldr r7, [r5, 0x630]
-_081DD1BC:
-	mul lr, r9, r1
-	add lr, r0, lr, asr 23
-	mul r12, r10, lr
-	bic r12, r12, 0xFF0000
-	add r6, r12, r6, ror 8
-	mul r12, r11, lr
-	bic r12, r12, 0xFF0000
-	add r7, r12, r7, ror 8
-	add r9, r9, r4
-	movs lr, r9, lsr 23
-	beq _081DD208
-	bic r9, r9, 0x3F800000
-	subs r2, r2, lr
-	ble _081DD134
-	subs lr, lr, 0x1
-	addeq r0, r0, r1
-_081DD1FC:
-	ldrsbne r0, [r3, lr]!
-	ldrsb r1, [r3, 0x1]!
-	sub r1, r1, r0
-_081DD208:
-	adds r5, r5, 0x40000000
-	bcc _081DD1BC
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	subs r8, r8, 0x4
-	bgt _081DD1B4
-	sub r3, r3, 0x1
-	ldmia sp!, {r4,r12}
-_081DD228:
-	str r9, [r4, 0x1C]
-_081DD22C:
-	str r2, [r4, 0x18]
-	str r3, [r4, 0x28]
-_081DD234:
-	ldr r8, [sp]
-	add r0, pc, 0x1
-	bx r0
-	.thumb
-_081DD240:
-	ldr r0, [sp, 0x4]
-	subs r0, 0x1
-	ble _081DD24A
-	adds r4, 0x40
-	b _081DCF40
-_081DD24A:
-	ldr r0, [sp, 0x18]
-	ldr r3, _081DD260
-	str r3, [r0]
-	add sp, 0x1C
-	pop {r0-r7}
-	mov r8, r0
-	mov r9, r1
-	mov r10, r2
-	mov r11, r3
-	pop {r3}
-_081DD25E:
-	bx r3
-	.align 2, 0
-_081DD260: .4byte 0x68736d53
-	thumb_func_end SoundMainRAM
-
-	arm_func_start sub_81DD264
-sub_81DD264: @ 81DD264
-	ldr r6, [r4, 0x24]
-	ldrb r0, [r4]
-	tst r0, 0x20
-	bne _081DD2B4
-	orr r0, r0, 0x20
-	strb r0, [r4]
-	ldrb r0, [r4, 0x1]
-	tst r0, 0x10
-	beq _081DD29C
-	ldr r1, [r6, 0xC]
-	add r1, r1, r6, lsl 1
-	add r1, r1, 0x20
-	sub r3, r1, r3
-	str r3, [r4, 0x28]
-_081DD29C:
-	ldrh r0, [r6]
-	cmp r0, 0
-	beq _081DD2B4
-	sub r3, r3, r6
-	sub r3, r3, 0x10
-	str r3, [r4, 0x28]
-_081DD2B4:
-	stmdb sp!, {r8,r12,lr}
-	mov r10, r10, lsl 16
-	mov r11, r11, lsl 16
-	ldr r1, [r4, 0x20]
-	ldrb r0, [r4, 0x1]
-	tst r0, 0x8
-	movne r8, 0x800000
-	muleq r8, r12, r1
-	ldrh r0, [r6]
-	cmp r0, 0
-	beq _081DD468
-	mov r0, 0xFF000000
-	str r0, [r4, 0x3C]
-	ldrb r0, [r4, 0x1]
-	tst r0, 0x10
-	bne _081DD3C0
-	bl sub_81DD520
-	mov r0, r1
-	add r3, r3, 0x1
-	bl sub_81DD520
-	sub r1, r1, r0
-_081DD308:
-	ldr r6, [r5]
-	ldr r7, [r5, 0x630]
-_081DD310:
-	mul lr, r9, r1
-	add lr, r0, lr, asr 23
-	mul r12, r10, lr
-	bic r12, r12, 0xFF0000
-	add r6, r12, r6, ror 8
-	mul r12, r11, lr
-	bic r12, r12, 0xFF0000
-	add r7, r12, r7, ror 8
-	add r9, r9, r8
-	movs lr, r9, lsr 23
-	beq _081DD370
-	bic r9, r9, 0x3F800000
-	subs r2, r2, lr
-	ble _081DD398
-	subs lr, lr, 0x1
-	bne _081DD358
-	add r0, r0, r1
-	b _081DD364
-_081DD358:
-	add r3, r3, lr
-	bl sub_81DD520
-	mov r0, r1
-_081DD364:
-	add r3, r3, 0x1
-	bl sub_81DD520
-	sub r1, r1, r0
-_081DD370:
-	adds r5, r5, 0x40000000
-	bcc _081DD310
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	ldr r6, [sp]
-	subs r6, r6, 0x4
-	str r6, [sp]
-	bgt _081DD308
-	sub r3, r3, 0x1
-	b _081DD4F0
-_081DD398:
-	ldr r0, [sp, 0x1C]
-	cmp r0, 0
-	beq _081DD4F4
-	ldr r3, [r4, 0x24]
-	ldr r3, [r3, 0x8]
-	rsb lr, r2, 0
-_081DD3B0:
-	adds r2, r2, r0
-	bgt _081DD358
-	sub lr, lr, r0
-	b _081DD3B0
-_081DD3C0:
-	sub r3, r3, 0x1
-	bl sub_81DD520
-	mov r0, r1
-	sub r3, r3, 0x1
-	bl sub_81DD520
-	sub r1, r1, r0
-_081DD3D8:
-	ldr r6, [r5]
-	ldr r7, [r5, 0x630]
-_081DD3E0:
-	mul lr, r9, r1
-	add lr, r0, lr, asr 23
-	mul r12, r10, lr
-	bic r12, r12, 0xFF0000
-	add r6, r12, r6, ror 8
-	mul r12, r11, lr
-	bic r12, r12, 0xFF0000
-	add r7, r12, r7, ror 8
-	add r9, r9, r8
-	movs lr, r9, lsr 23
-	beq _081DD440
-	bic r9, r9, 0x3F800000
-	subs r2, r2, lr
-	ble _081DD4F4
-	subs lr, lr, 0x1
-	bne _081DD428
-	add r0, r0, r1
-	b _081DD434
-_081DD428:
-	sub r3, r3, lr
-	bl sub_81DD520
-	mov r0, r1
-_081DD434:
-	sub r3, r3, 0x1
-	bl sub_81DD520
-	sub r1, r1, r0
-_081DD440:
-	adds r5, r5, 0x40000000
-	bcc _081DD3E0
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	ldr r6, [sp]
-	subs r6, r6, 0x4
-	str r6, [sp]
-	bgt _081DD3D8
-	add r3, r3, 0x2
-	b _081DD4F0
-_081DD468:
-	ldrb r0, [r4, 0x1]
-	tst r0, 0x10
-	beq _081DD4F0
-	ldrsb r0, [r3, -0x1]!
-	ldrsb r1, [r3, -0x1]
-	sub r1, r1, r0
-_081DD480:
-	ldr r6, [r5]
-	ldr r7, [r5, 0x630]
-_081DD488:
-	mul lr, r9, r1
-	add lr, r0, lr, asr 23
-	mul r12, r10, lr
-	bic r12, r12, 0xFF0000
-	add r6, r12, r6, ror 8
-	mul r12, r11, lr
-	bic r12, r12, 0xFF0000
-	add r7, r12, r7, ror 8
-	add r9, r9, r8
-	movs lr, r9, lsr 23
-	beq _081DD4CC
-	bic r9, r9, 0x3F800000
-	subs r2, r2, lr
-	ble _081DD4F4
-	ldrsb r0, [r3, -lr]!
-	ldrsb r1, [r3, -0x1]
-	sub r1, r1, r0
-_081DD4CC:
-	adds r5, r5, 0x40000000
-	bcc _081DD488
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	ldr r6, [sp]
-	subs r6, r6, 0x4
-	str r6, [sp]
-	bgt _081DD480
-	add r3, r3, 0x1
-_081DD4F0:
-	ldmia sp!, {r8,r12,pc}
-_081DD4F4:
-	mov r2, 0
-	strb r2, [r4]
-	mov r0, r5, lsr 30
-	bic r5, r5, 0xC0000000
-	rsb r0, r0, 0x3
-	mov r0, r0, lsl 3
-	mov r6, r6, ror r0
-	mov r7, r7, ror r0
-	str r7, [r5, 0x630]
-	str r6, [r5], 0x4
-	ldmia sp!, {r8,r12,pc}
-	arm_func_end sub_81DD264
-
-	arm_func_start sub_81DD520
-sub_81DD520: @ 81DD520
-	stmdb sp!, {r0,r2,r5-r7,lr}
-	mov r0, r3, lsr 6
-	ldr r1, [r4, 0x3C]
-	cmp r0, r1
-	beq _081DD594
-	str r0, [r4, 0x3C]
-	mov r1, 0x21
-	mul r2, r1, r0
-	ldr r1, [r4, 0x24]
-	add r2, r2, r1
-	add r2, r2, 0x10
-	ldr r5, _081DD5A4
-	ldr r6, _081DD5A8
-	mov r7, 0x40
-	ldrb lr, [r2], 0x1
-	strb lr, [r5], 0x1
-	ldrb r1, [r2], 0x1
-	b _081DD57C
-_081DD568:
-	ldrb r1, [r2], 0x1
-	mov r0, r1, lsr 4
-	ldrsb r0, [r6, r0]
-	add lr, lr, r0
-	strb lr, [r5], 0x1
-_081DD57C:
-	and r0, r1, 0xF
-	ldrsb r0, [r6, r0]
-	add lr, lr, r0
-	strb lr, [r5], 0x1
-	subs r7, r7, 0x2
-	bgt _081DD568
-_081DD594:
-	ldr r5, _081DD5A4
-	and r0, r3, 0x3F
-	ldrsb r1, [r5, r0]
-	ldmia sp!, {r0,r2,r5-r7,pc}
-	.align 2, 0
-_081DD5A4: .4byte 0x030007b8
-_081DD5A8: .4byte gUnknown_0842F9F4
-	arm_func_end sub_81DD520
-
-	thumb_func_start SoundMainBTM
-SoundMainBTM: @ 81DD5AC
-	mov r12, r4
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0
-	movs r4, 0
-	stm r0!, {r1-r4}
-	stm r0!, {r1-r4}
-	stm r0!, {r1-r4}
-	stm r0!, {r1-r4}
-	mov r4, r12
-	bx lr
-	thumb_func_end SoundMainBTM
-
-	thumb_func_start ClearChain
-ClearChain: @ 81DD5C4
-	ldr r3, [r0, 0x2C]
-	cmp r3, 0
-	beq _081DD5E2
-	ldr r1, [r0, 0x34]
-	ldr r2, [r0, 0x30]
-	cmp r2, 0
-	beq _081DD5D6
-	str r1, [r2, 0x34]
-	b _081DD5D8
-_081DD5D6:
-	str r1, [r3, 0x20]
-_081DD5D8:
-	cmp r1, 0
-	beq _081DD5DE
-	str r2, [r1, 0x30]
-_081DD5DE:
-	movs r1, 0
-	str r1, [r0, 0x2C]
-_081DD5E2:
-	bx lr
-	thumb_func_end ClearChain
-
-	thumb_func_start ply_fine
-ply_fine: @ 81DD5E4
-	push {r4,r5,lr}
-	adds r5, r1, 0
-	ldr r4, [r5, 0x20]
-	cmp r4, 0
-	beq _081DD608
-_081DD5EE:
-	ldrb r1, [r4]
-	movs r0, 0xC7
-	tst r0, r1
-	beq _081DD5FC
-	movs r0, 0x40
-	orrs r1, r0
-	strb r1, [r4]
-_081DD5FC:
-	adds r0, r4, 0
-	bl ClearChain
-	ldr r4, [r4, 0x34]
-	cmp r4, 0
-	bne _081DD5EE
-_081DD608:
-	movs r0, 0
-	strb r0, [r5]
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end ply_fine
-
-	thumb_func_start MPlyJmpTblCopy
-MPlyJmpTblCopy: @ 81DD614
-	mov r12, lr
-	movs r1, 0x24
-	ldr r2, _081DD644
-_081DD61A:
-	ldr r3, [r2]
-	bl chk_adr_r2
-	stm r0!, {r3}
-	adds r2, 0x4
-	subs r1, 0x1
-	bgt _081DD61A
-	bx r12
-	thumb_func_end MPlyJmpTblCopy
-
-	thumb_func_start ldrb_r3_r2
-ldrb_r3_r2: @ 81DD62C
-	ldrb r3, [r2]
-	thumb_func_end ldrb_r3_r2
-
-	non_word_aligned_thumb_func_start chk_adr_r2
-chk_adr_r2: @ 81DD62E
-	push {r0}
-	lsrs r0, r2, 25
-	bne _081DD640
-	ldr r0, _081DD644
-	cmp r2, r0
-	bcc _081DD63E
-	lsrs r0, r2, 14
-	beq _081DD640
-_081DD63E:
-	movs r3, 0
-_081DD640:
-	pop {r0}
-	bx lr
-	.align 2, 0
-_081DD644: .4byte gUnknown_0842F964
-	thumb_func_end chk_adr_r2
-
-	thumb_func_start ld_r3_tp_adr_i
-ld_r3_tp_adr_i: @ 81DD648
-	ldr r2, [r1, 0x40]
-_081DD64A:
-	adds r3, r2, 0x1
-	str r3, [r1, 0x40]
-	ldrb r3, [r2]
-	b chk_adr_r2
-	thumb_func_end ld_r3_tp_adr_i
-
-	thumb_func_start ply_goto
-ply_goto: @ 81DD654
-	push {lr}
-_081DD656:
-	ldr r2, [r1, 0x40]
-	ldrb r0, [r2, 0x3]
-	lsls r0, 8
-	ldrb r3, [r2, 0x2]
-	orrs r0, r3
-	lsls r0, 8
-	ldrb r3, [r2, 0x1]
-	orrs r0, r3
-	lsls r0, 8
-	bl ldrb_r3_r2
-	orrs r0, r3
-	str r0, [r1, 0x40]
-	pop {r0}
-	bx r0
-	thumb_func_end ply_goto
-
-	thumb_func_start ply_patt
-ply_patt: @ 81DD674
-	ldrb r2, [r1, 0x2]
-	cmp r2, 0x3
-	bcs _081DD68C
-	lsls r2, 2
-	adds r3, r1, r2
-	ldr r2, [r1, 0x40]
-	adds r2, 0x4
-	str r2, [r3, 0x44]
-	ldrb r2, [r1, 0x2]
-	adds r2, 0x1
-	strb r2, [r1, 0x2]
-	b ply_goto
-_081DD68C:
-	b ply_fine
-	thumb_func_end ply_patt
-
-	thumb_func_start play_pend
-play_pend: @ 81DD690
-	ldrb r2, [r1, 0x2]
-	cmp r2, 0
-	beq _081DD6A2
-	subs r2, 0x1
-	strb r2, [r1, 0x2]
-	lsls r2, 2
-	adds r3, r1, r2
-	ldr r2, [r3, 0x44]
-	str r2, [r1, 0x40]
-_081DD6A2:
-	bx lr
-	thumb_func_end play_pend
-
-	thumb_func_start ply_rept
-ply_rept: @ 81DD6A4
-	push {lr}
-	ldr r2, [r1, 0x40]
-	ldrb r3, [r2]
-	cmp r3, 0
-	bne _081DD6B4
-	adds r2, 0x1
-	str r2, [r1, 0x40]
-	b _081DD656
-_081DD6B4:
-	ldrb r3, [r1, 0x3]
-	adds r3, 0x1
-	strb r3, [r1, 0x3]
-	mov r12, r3
-	bl ld_r3_tp_adr_i
-	cmp r12, r3
-	bcs _081DD6C6
-	b _081DD656
-_081DD6C6:
-	movs r3, 0
-	strb r3, [r1, 0x3]
-	adds r2, 0x5
-	str r2, [r1, 0x40]
-	pop {r0}
-	bx r0
-	thumb_func_end ply_rept
-
-	thumb_func_start ply_prio
-ply_prio: @ 81DD6D4
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	strb r3, [r1, 0x1D]
-	bx r12
-	thumb_func_end ply_prio
-
-	thumb_func_start ply_tempo
-ply_tempo: @ 81DD6E0
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	lsls r3, 1
-	strh r3, [r0, 0x1C]
-	ldrh r2, [r0, 0x1E]
-	muls r3, r2
-	lsrs r3, 8
-	strh r3, [r0, 0x20]
-	bx r12
-	thumb_func_end ply_tempo
-
-	thumb_func_start ply_keysh
-ply_keysh: @ 81DD6F4
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	strb r3, [r1, 0xA]
-	ldrb r3, [r1]
-	movs r2, 0xC
-	orrs r3, r2
-	strb r3, [r1]
-	bx r12
-	thumb_func_end ply_keysh
-
-	thumb_func_start ply_voice
-ply_voice: @ 81DD708
-	mov r12, lr
-	ldr r2, [r1, 0x40]
-	ldrb r3, [r2]
-	adds r2, 0x1
-	str r2, [r1, 0x40]
-	lsls r2, r3, 1
-	adds r2, r3
-	lsls r2, 2
-	ldr r3, [r0, 0x30]
-	adds r2, r3
-	ldr r3, [r2]
-	bl chk_adr_r2
-	str r3, [r1, 0x24]
-	ldr r3, [r2, 0x4]
-	bl chk_adr_r2
-	str r3, [r1, 0x28]
-	ldr r3, [r2, 0x8]
-	bl chk_adr_r2
-	str r3, [r1, 0x2C]
-	bx r12
-	thumb_func_end ply_voice
-
-	thumb_func_start ply_vol
-ply_vol: @ 81DD738
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	strb r3, [r1, 0x12]
-	ldrb r3, [r1]
-	movs r2, 0x3
-	orrs r3, r2
-	strb r3, [r1]
-	bx r12
-	thumb_func_end ply_vol
-
-	thumb_func_start ply_pan
-ply_pan: @ 81DD74C
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	subs r3, 0x40
-	strb r3, [r1, 0x14]
-	ldrb r3, [r1]
-	movs r2, 0x3
-	orrs r3, r2
-	strb r3, [r1]
-	bx r12
-	thumb_func_end ply_pan
-
-	thumb_func_start ply_bend
-ply_bend: @ 81DD760
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	subs r3, 0x40
-	strb r3, [r1, 0xE]
-	ldrb r3, [r1]
-	movs r2, 0xC
-	orrs r3, r2
-	strb r3, [r1]
-	bx r12
-	thumb_func_end ply_bend
-
-	thumb_func_start ply_bendr
-ply_bendr: @ 81DD774
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	strb r3, [r1, 0xF]
-	ldrb r3, [r1]
-	movs r2, 0xC
-	orrs r3, r2
-	strb r3, [r1]
-	bx r12
-	thumb_func_end ply_bendr
-
-	thumb_func_start ply_lfodl
-ply_lfodl: @ 81DD788
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	strb r3, [r1, 0x1B]
-	bx r12
-	thumb_func_end ply_lfodl
-
-	thumb_func_start ply_modt
-ply_modt: @ 81DD794
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	ldrb r0, [r1, 0x18]
-	cmp r0, r3
-	beq _081DD7AA
-	strb r3, [r1, 0x18]
-	ldrb r3, [r1]
-	movs r2, 0xF
-	orrs r3, r2
-	strb r3, [r1]
-_081DD7AA:
-	bx r12
-	thumb_func_end ply_modt
-
-	thumb_func_start ply_tune
-ply_tune: @ 81DD7AC
-	mov r12, lr
-	bl ld_r3_tp_adr_i
-	subs r3, 0x40
-	strb r3, [r1, 0xC]
-	ldrb r3, [r1]
-	movs r2, 0xC
-	orrs r3, r2
-	strb r3, [r1]
-	bx r12
-	thumb_func_end ply_tune
-
-	thumb_func_start ply_port
-ply_port: @ 81DD7C0
-	mov r12, lr
-	ldr r2, [r1, 0x40]
-	ldrb r3, [r2]
-	adds r2, 0x1
-	ldr r0, _081DD7D4
-	adds r0, r3
-	bl _081DD64A
-	strb r3, [r0]
-	bx r12
-	.align 2, 0
-_081DD7D4: .4byte 0x04000060
-	thumb_func_end ply_port
-
-	thumb_func_start SoundVSync_rev01
-SoundVSync_rev01: @ 81DD7D8
-	ldr r0, _081DDA84
-	ldr r0, [r0]
-	ldr r2, _081DDA88
-	ldr r3, [r0]
-	subs r3, r2
-	cmp r3, 0x1
-	bhi _081DD818
-	ldrb r1, [r0, 0x4]
-	subs r1, 0x1
-	strb r1, [r0, 0x4]
-	bgt _081DD818
-	ldrb r1, [r0, 0xB]
-	strb r1, [r0, 0x4]
-	ldr r2, _081DD81C
-	ldr r1, [r2, 0x8]
-	lsls r1, 7
-	bcc _081DD7FE
-	ldr r1, _081DD820
-	str r1, [r2, 0x8]
-_081DD7FE:
-	ldr r1, [r2, 0x14]
-	lsls r1, 7
-	bcc _081DD808
-	ldr r1, _081DD820
-	str r1, [r2, 0x14]
-_081DD808:
-	movs r1, 0x4
-	lsls r1, 8
-	strh r1, [r2, 0xA]
-	strh r1, [r2, 0x16]
-	movs r1, 0xB6
-	lsls r1, 8
-	strh r1, [r2, 0xA]
-	strh r1, [r2, 0x16]
-_081DD818:
-	bx lr
-	.align 2, 0
-_081DD81C: .4byte 0x040000bc
-_081DD820: .4byte 0x84400004
-	thumb_func_end SoundVSync_rev01
-
-	thumb_func_start MPlayMain_rev01
-MPlayMain_rev01: @ 81DD824
-	ldr r2, _081DDA88
-	ldr r3, [r0, 0x34]
-	cmp r2, r3
-	beq _081DD82E
-	bx lr
-_081DD82E:
-	adds r3, 0x1
-	str r3, [r0, 0x34]
-	push {r0,lr}
-	ldr r3, [r0, 0x38]
-	cmp r3, 0
-	beq _081DD840
-	ldr r0, [r0, 0x3C]
-	bl _081DDA7C
-_081DD840:
-	pop {r0}
-	push {r4-r7}
-	mov r4, r8
-	mov r5, r9
-	mov r6, r10
-	mov r7, r11
-	push {r4-r7}
-	adds r7, r0, 0
-	ldr r0, [r7, 0x4]
-	cmp r0, 0
-	bge _081DD858
-	b _081DDA6C
-_081DD858:
-	ldr r0, _081DDA84
-	ldr r0, [r0]
-	mov r8, r0
-	adds r0, r7, 0
-	bl FadeOutBody_rev01
-	ldr r0, [r7, 0x4]
-	cmp r0, 0
-	bge _081DD86C
-	b _081DDA6C
-_081DD86C:
-	ldrh r0, [r7, 0x22]
-	ldrh r1, [r7, 0x20]
-	adds r0, r1
-	b _081DD9BC
-_081DD874:
-	ldrb r6, [r7, 0x8]
-	ldr r5, [r7, 0x2C]
-	movs r3, 0x1
-	movs r4, 0
-_081DD87C:
-	ldrb r0, [r5]
-	movs r1, 0x80
-	tst r1, r0
-	bne _081DD886
-	b _081DD998
-_081DD886:
-	mov r10, r3
-	orrs r4, r3
-	mov r11, r4
-	ldr r4, [r5, 0x20]
-	cmp r4, 0
-	beq _081DD8BA
-_081DD892:
-	ldrb r1, [r4]
-	movs r0, 0xC7
-	tst r0, r1
-	beq _081DD8AE
-	ldrb r0, [r4, 0x10]
-	cmp r0, 0
-	beq _081DD8B4
-	subs r0, 0x1
-	strb r0, [r4, 0x10]
-	bne _081DD8B4
-	movs r0, 0x40
-	orrs r1, r0
-	strb r1, [r4]
-	b _081DD8B4
-_081DD8AE:
-	adds r0, r4, 0
-	bl ClearChain_rev
-_081DD8B4:
-	ldr r4, [r4, 0x34]
-	cmp r4, 0
-	bne _081DD892
-_081DD8BA:
-	ldrb r3, [r5]
-	movs r0, 0x40
-	tst r0, r3
-	beq _081DD938
-	adds r0, r5, 0
-	bl Clear64byte_rev
-	movs r0, 0x80
-	strb r0, [r5]
-	movs r0, 0x2
-	strb r0, [r5, 0xF]
-	movs r0, 0x40
-	strb r0, [r5, 0x13]
-	movs r0, 0x16
-	strb r0, [r5, 0x19]
-	movs r0, 0x1
-	adds r1, r5, 0x6
-	strb r0, [r1, 0x1E]
-	b _081DD938
-_081DD8E0:
-	ldr r2, [r5, 0x40]
-	ldrb r1, [r2]
-	cmp r1, 0x80
-	bcs _081DD8EC
-	ldrb r1, [r5, 0x7]
-	b _081DD8F6
-_081DD8EC:
-	adds r2, 0x1
-	str r2, [r5, 0x40]
-	cmp r1, 0xBD
-	bcc _081DD8F6
-	strb r1, [r5, 0x7]
-_081DD8F6:
-	cmp r1, 0xCF
-	bcc _081DD90C
-	mov r0, r8
-	ldr r3, [r0, 0x38]
-	adds r0, r1, 0
-	subs r0, 0xCF
-	adds r1, r7, 0
-	adds r2, r5, 0
-	bl _081DDA7C
-	b _081DD938
-_081DD90C:
-	cmp r1, 0xB0
-	bls _081DD92E
-	adds r0, r1, 0
-	subs r0, 0xB1
-	strb r0, [r7, 0xA]
-	mov r3, r8
-	ldr r3, [r3, 0x34]
-	lsls r0, 2
-	ldr r3, [r3, r0]
-	adds r0, r7, 0
-	adds r1, r5, 0
-	bl _081DDA7C
-	ldrb r0, [r5]
-	cmp r0, 0
-	beq _081DD994
-	b _081DD938
-_081DD92E:
-	ldr r0, _081DDA80
-	subs r1, 0x80
-	adds r1, r0
-	ldrb r0, [r1]
-	strb r0, [r5, 0x1]
-_081DD938:
-	ldrb r0, [r5, 0x1]
-	cmp r0, 0
-	beq _081DD8E0
-	subs r0, 0x1
-	strb r0, [r5, 0x1]
-	ldrb r1, [r5, 0x19]
-	cmp r1, 0
-	beq _081DD994
-	ldrb r0, [r5, 0x17]
-	cmp r0, 0
-	beq _081DD994
-	ldrb r0, [r5, 0x1C]
-	cmp r0, 0
-	beq _081DD95A
-	subs r0, 0x1
-	strb r0, [r5, 0x1C]
-	b _081DD994
-_081DD95A:
-	ldrb r0, [r5, 0x1A]
-	adds r0, r1
-	strb r0, [r5, 0x1A]
-	adds r1, r0, 0
-	subs r0, 0x40
-	lsls r0, 24
-	bpl _081DD96E
-	lsls r2, r1, 24
-	asrs r2, 24
-	b _081DD972
-_081DD96E:
-	movs r0, 0x80
-	subs r2, r0, r1
-_081DD972:
-	ldrb r0, [r5, 0x17]
-	muls r0, r2
-	asrs r2, r0, 6
-	ldrb r0, [r5, 0x16]
-	eors r0, r2
-	lsls r0, 24
-	beq _081DD994
-	strb r2, [r5, 0x16]
-	ldrb r0, [r5]
-	ldrb r1, [r5, 0x18]
-	cmp r1, 0
-	bne _081DD98E
-	movs r1, 0xC
-	b _081DD990
-_081DD98E:
-	movs r1, 0x3
-_081DD990:
-	orrs r0, r1
-	strb r0, [r5]
-_081DD994:
-	mov r3, r10
-	mov r4, r11
-_081DD998:
-	subs r6, 0x1
-	ble _081DD9A4
-	movs r0, 0x50
-	adds r5, r0
-	lsls r3, 1
-	b _081DD87C
-_081DD9A4:
-	ldr r0, [r7, 0xC]
-	adds r0, 0x1
-	str r0, [r7, 0xC]
-	cmp r4, 0
-	bne _081DD9B6
-	movs r0, 0x80
-	lsls r0, 24
-	str r0, [r7, 0x4]
-	b _081DDA6C
-_081DD9B6:
-	str r4, [r7, 0x4]
-	ldrh r0, [r7, 0x22]
-	subs r0, 0x96
-_081DD9BC:
-	strh r0, [r7, 0x22]
-	cmp r0, 0x96
-	bcc _081DD9C4
-	b _081DD874
-_081DD9C4:
-	ldrb r2, [r7, 0x8]
-	ldr r5, [r7, 0x2C]
-_081DD9C8:
-	ldrb r0, [r5]
-	movs r1, 0x80
-	tst r1, r0
-	beq _081DDA62
-	movs r1, 0xF
-	tst r1, r0
-	beq _081DDA62
-	mov r9, r2
-	adds r0, r7, 0
-	adds r1, r5, 0
-	bl TrkVolPitSet_rev01
-	ldr r4, [r5, 0x20]
-	cmp r4, 0
-	beq _081DDA58
-_081DD9E6:
-	ldrb r1, [r4]
-	movs r0, 0xC7
-	tst r0, r1
-	bne _081DD9F6
-	adds r0, r4, 0
-	bl ClearChain_rev
-	b _081DDA52
-_081DD9F6:
-	ldrb r0, [r4, 0x1]
-	movs r6, 0x7
-	ands r6, r0
-	ldrb r3, [r5]
-	movs r0, 0x3
-	tst r0, r3
-	beq _081DDA14
-	bl ChnVolSetAsm
-	cmp r6, 0
-	beq _081DDA14
-	ldrb r0, [r4, 0x1D]
-	movs r1, 0x1
-	orrs r0, r1
-	strb r0, [r4, 0x1D]
-_081DDA14:
-	ldrb r3, [r5]
-	movs r0, 0xC
-	tst r0, r3
-	beq _081DDA52
-	ldrb r1, [r4, 0x8]
-	movs r0, 0x8
-	ldrsb r0, [r5, r0]
-	adds r2, r1, r0
-	bpl _081DDA28
-	movs r2, 0
-_081DDA28:
-	cmp r6, 0
-	beq _081DDA46
-	mov r0, r8
-	ldr r3, [r0, 0x30]
-	adds r1, r2, 0
-	ldrb r2, [r5, 0x9]
-	adds r0, r6, 0
-	bl _081DDA7C
-	str r0, [r4, 0x20]
-	ldrb r0, [r4, 0x1D]
-	movs r1, 0x2
-	orrs r0, r1
-	strb r0, [r4, 0x1D]
-	b _081DDA52
-_081DDA46:
-	adds r1, r2, 0
-	ldrb r2, [r5, 0x9]
-	ldr r0, [r4, 0x24]
-	bl MidiKey2fr
-	str r0, [r4, 0x20]
-_081DDA52:
-	ldr r4, [r4, 0x34]
-	cmp r4, 0
-	bne _081DD9E6
-_081DDA58:
-	ldrb r0, [r5]
-	movs r1, 0xF0
-	ands r0, r1
-	strb r0, [r5]
-	mov r2, r9
-_081DDA62:
-	subs r2, 0x1
-	ble _081DDA6C
-	movs r0, 0x50
-	adds r5, r0
-	bgt _081DD9C8
-_081DDA6C:
-	ldr r0, _081DDA88
-	str r0, [r7, 0x34]
-	pop {r0-r7}
-	mov r8, r0
-	mov r9, r1
-	mov r10, r2
-	mov r11, r3
-	pop {r3}
-_081DDA7C:
-	bx r3
-	.align 2, 0
-_081DDA80: .4byte gUnknown_0842FBE8
-_081DDA84: .4byte 0x03007ff0
-_081DDA88: .4byte 0x68736d53
-	thumb_func_end MPlayMain_rev01
-
-	thumb_func_start TrackStop_rev01
-TrackStop_rev01: @ 81DDA8C
-	push {r4-r6,lr}
-	adds r5, r1, 0
-	ldrb r1, [r5]
-	movs r0, 0x80
-	tst r0, r1
-	beq _081DDAC4
-	ldr r4, [r5, 0x20]
-	cmp r4, 0
-	beq _081DDAC2
-	movs r6, 0
-_081DDAA0:
-	ldrb r0, [r4]
-	cmp r0, 0
-	beq _081DDABA
-	ldrb r0, [r4, 0x1]
-	movs r3, 0x7
-	ands r0, r3
-	beq _081DDAB8
-	ldr r3, _081DDACC
-	ldr r3, [r3]
-	ldr r3, [r3, 0x2C]
-	bl _081DDA7C
-_081DDAB8:
-	strb r6, [r4]
-_081DDABA:
-	str r6, [r4, 0x2C]
-	ldr r4, [r4, 0x34]
-	cmp r4, 0
-	bne _081DDAA0
-_081DDAC2:
-	str r4, [r5, 0x20]
-_081DDAC4:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DDACC: .4byte 0x03007ff0
-	thumb_func_end TrackStop_rev01
-
-	thumb_func_start ChnVolSetAsm
-ChnVolSetAsm: @ 81DDAD0
-	ldrb r1, [r4, 0x12]
-	movs r0, 0x14
-	ldrsb r2, [r4, r0]
-	movs r3, 0x80
-	adds r3, r2
-	muls r3, r1
-	ldrb r0, [r5, 0x10]
-	muls r0, r3
-	asrs r0, 14
-	cmp r0, 0xFF
-	bls _081DDAE8
-	movs r0, 0xFF
-_081DDAE8:
-	strb r0, [r4, 0x2]
-	movs r3, 0x7F
-	subs r3, r2
-	muls r3, r1
-	ldrb r0, [r5, 0x11]
-	muls r0, r3
-	asrs r0, 14
-	cmp r0, 0xFF
-	bls _081DDAFC
-	movs r0, 0xFF
-_081DDAFC:
-	strb r0, [r4, 0x3]
-	bx lr
-	thumb_func_end ChnVolSetAsm
-
-	thumb_func_start ply_note_rev01
-ply_note_rev01: @ 81DDB00
-	push {r4-r7,lr}
-	mov r4, r8
-	mov r5, r9
-	mov r6, r10
-	mov r7, r11
-	push {r4-r7}
-	sub sp, 0x18
-	str r1, [sp]
-	adds r5, r2, 0
-	ldr r1, _081DDCFC
-	ldr r1, [r1]
-	str r1, [sp, 0x4]
-	ldr r1, _081DDD00
-	adds r0, r1
-	ldrb r0, [r0]
-	strb r0, [r5, 0x4]
-	ldr r3, [r5, 0x40]
-	ldrb r0, [r3]
-	cmp r0, 0x80
-	bcs _081DDB46
-	strb r0, [r5, 0x5]
-	adds r3, 0x1
-	ldrb r0, [r3]
-	cmp r0, 0x80
-	bcs _081DDB44
-	strb r0, [r5, 0x6]
-	adds r3, 0x1
-	ldrb r0, [r3]
-	cmp r0, 0x80
-	bcs _081DDB44
-	ldrb r1, [r5, 0x4]
-	adds r1, r0
-	strb r1, [r5, 0x4]
-	adds r3, 0x1
-_081DDB44:
-	str r3, [r5, 0x40]
-_081DDB46:
-	movs r0, 0
-	str r0, [sp, 0x14]
-	adds r4, r5, 0
-	adds r4, 0x24
-	ldrb r2, [r4]
-	movs r0, 0xC0
-	tst r0, r2
-	beq _081DDB98
-	ldrb r3, [r5, 0x5]
-	movs r0, 0x40
-	tst r0, r2
-	beq _081DDB66
-	ldr r1, [r5, 0x2C]
-	adds r1, r3
-	ldrb r0, [r1]
-	b _081DDB68
-_081DDB66:
-	adds r0, r3, 0
-_081DDB68:
-	lsls r1, r0, 1
-	adds r1, r0
-	lsls r1, 2
-	ldr r0, [r5, 0x28]
-	adds r1, r0
-	mov r9, r1
-	mov r6, r9
-	ldrb r1, [r6]
-	movs r0, 0xC0
-	tst r0, r1
-	beq _081DDB80
-	b _081DDCEA
-_081DDB80:
-	movs r0, 0x80
-	tst r0, r2
-	beq _081DDB9C
-	ldrb r1, [r6, 0x3]
-	movs r0, 0x80
-	tst r0, r1
-	beq _081DDB94
-	subs r1, 0xC0
-	lsls r1, 1
-	str r1, [sp, 0x14]
-_081DDB94:
-	ldrb r3, [r6, 0x1]
-	b _081DDB9C
-_081DDB98:
-	mov r9, r4
-	ldrb r3, [r5, 0x5]
-_081DDB9C:
-	str r3, [sp, 0x8]
-	ldr r6, [sp]
-	ldrb r1, [r6, 0x9]
-	ldrb r0, [r5, 0x1D]
-	adds r0, r1
-	cmp r0, 0xFF
-	bls _081DDBAC
-	movs r0, 0xFF
-_081DDBAC:
-	str r0, [sp, 0x10]
-	mov r6, r9
-	ldrb r0, [r6]
-	movs r6, 0x7
-	ands r6, r0
-	str r6, [sp, 0xC]
-	beq _081DDBEC
-	ldr r0, [sp, 0x4]
-	ldr r4, [r0, 0x1C]
-	cmp r4, 0
-	bne _081DDBC4
-	b _081DDCEA
-_081DDBC4:
-	subs r6, 0x1
-	lsls r0, r6, 6
-	adds r4, r0
-	ldrb r1, [r4]
-	movs r0, 0xC7
-	tst r0, r1
-	beq _081DDC40
-	movs r0, 0x40
-	tst r0, r1
-	bne _081DDC40
-	ldrb r1, [r4, 0x13]
-	ldr r0, [sp, 0x10]
-	cmp r1, r0
-	bcc _081DDC40
-	beq _081DDBE4
-	b _081DDCEA
-_081DDBE4:
-	ldr r0, [r4, 0x2C]
-	cmp r0, r5
-	bcs _081DDC40
-	b _081DDCEA
-_081DDBEC:
-	ldr r6, [sp, 0x10]
-	adds r7, r5, 0
-	movs r2, 0
-	mov r8, r2
-	ldr r4, [sp, 0x4]
-	ldrb r3, [r4, 0x6]
-	adds r4, 0x50
-_081DDBFA:
-	ldrb r1, [r4]
-	movs r0, 0xC7
-	tst r0, r1
-	beq _081DDC40
-	movs r0, 0x40
-	tst r0, r1
-	beq _081DDC14
-	cmp r2, 0
-	bne _081DDC18
-	adds r2, 0x1
-	ldrb r6, [r4, 0x13]
-	ldr r7, [r4, 0x2C]
-	b _081DDC32
-_081DDC14:
-	cmp r2, 0
-	bne _081DDC34
-_081DDC18:
-	ldrb r0, [r4, 0x13]
-	cmp r0, r6
-	bcs _081DDC24
-	adds r6, r0, 0
-	ldr r7, [r4, 0x2C]
-	b _081DDC32
-_081DDC24:
-	bhi _081DDC34
-	ldr r0, [r4, 0x2C]
-	cmp r0, r7
-	bls _081DDC30
-	adds r7, r0, 0
-	b _081DDC32
-_081DDC30:
-	bcc _081DDC34
-_081DDC32:
-	mov r8, r4
-_081DDC34:
-	adds r4, 0x40
-	subs r3, 0x1
-	bgt _081DDBFA
-	mov r4, r8
-	cmp r4, 0
-	beq _081DDCEA
-_081DDC40:
-	adds r0, r4, 0
-	bl ClearChain_rev
-	movs r1, 0
-	str r1, [r4, 0x30]
-	ldr r3, [r5, 0x20]
-	str r3, [r4, 0x34]
-	cmp r3, 0
-	beq _081DDC54
-	str r4, [r3, 0x30]
-_081DDC54:
-	str r4, [r5, 0x20]
-	str r5, [r4, 0x2C]
-	ldrb r0, [r5, 0x1B]
-	strb r0, [r5, 0x1C]
-	cmp r0, r1
-	beq _081DDC66
-	adds r1, r5, 0
-	bl clear_modM
-_081DDC66:
-	ldr r0, [sp]
-	adds r1, r5, 0
-	bl TrkVolPitSet_rev01
-	ldr r0, [r5, 0x4]
-	str r0, [r4, 0x10]
-	ldr r0, [sp, 0x10]
-	strb r0, [r4, 0x13]
-	ldr r0, [sp, 0x8]
-	strb r0, [r4, 0x8]
-	ldr r0, [sp, 0x14]
-	strb r0, [r4, 0x14]
-	mov r6, r9
-	ldrb r0, [r6]
-	strb r0, [r4, 0x1]
-	ldr r7, [r6, 0x4]
-	str r7, [r4, 0x24]
-	ldr r0, [r6, 0x8]
-	str r0, [r4, 0x4]
-	ldrh r0, [r5, 0x1E]
-	strh r0, [r4, 0xC]
-	bl ChnVolSetAsm
-	ldrb r1, [r4, 0x8]
-	movs r0, 0x8
-	ldrsb r0, [r5, r0]
-	adds r3, r1, r0
-	bpl _081DDCA0
-	movs r3, 0
-_081DDCA0:
-	ldr r6, [sp, 0xC]
-	cmp r6, 0
-	beq _081DDCCE
-	mov r6, r9
-	ldrb r0, [r6, 0x2]
-	strb r0, [r4, 0x1E]
-	ldrb r1, [r6, 0x3]
-	movs r0, 0x80
-	tst r0, r1
-	bne _081DDCBA
-	movs r0, 0x70
-	tst r0, r1
-	bne _081DDCBC
-_081DDCBA:
-	movs r1, 0x8
-_081DDCBC:
-	strb r1, [r4, 0x1F]
-	ldrb r2, [r5, 0x9]
-	adds r1, r3, 0
-	ldr r0, [sp, 0xC]
-	ldr r3, [sp, 0x4]
-	ldr r3, [r3, 0x30]
-	bl _081DDA7C
-	b _081DDCDC
-_081DDCCE:
-	ldr r0, [r5, 0x3C]
-	str r0, [r4, 0x18]
-	ldrb r2, [r5, 0x9]
-	adds r1, r3, 0
-	adds r0, r7, 0
-	bl MidiKey2fr
-_081DDCDC:
-	str r0, [r4, 0x20]
-	movs r0, 0x80
-	strb r0, [r4]
-	ldrb r1, [r5]
-	movs r0, 0xF0
-	ands r0, r1
-	strb r0, [r5]
-_081DDCEA:
-	add sp, 0x18
-	pop {r0-r7}
-	mov r8, r0
-	mov r9, r1
-	mov r10, r2
-	mov r11, r3
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DDCFC: .4byte 0x03007ff0
-_081DDD00: .4byte gUnknown_0842FBE8
-	thumb_func_end ply_note_rev01
-
-	thumb_func_start ply_endtie_rev01
-ply_endtie_rev01: @ 81DDD04
-	push {r4,r5}
-	ldr r2, [r1, 0x40]
-	ldrb r3, [r2]
-	cmp r3, 0x80
-	bcs _081DDD16
-	strb r3, [r1, 0x5]
-	adds r2, 0x1
-	str r2, [r1, 0x40]
-	b _081DDD18
-_081DDD16:
-	ldrb r3, [r1, 0x5]
-_081DDD18:
-	ldr r1, [r1, 0x20]
-	cmp r1, 0
-	beq _081DDD40
-	movs r4, 0x83
-	movs r5, 0x40
-_081DDD22:
-	ldrb r2, [r1]
-	tst r2, r4
-	beq _081DDD3A
-	tst r2, r5
-	bne _081DDD3A
-	ldrb r0, [r1, 0x11]
-	cmp r0, r3
-	bne _081DDD3A
-	movs r0, 0x40
-	orrs r2, r0
-	strb r2, [r1]
-	b _081DDD40
-_081DDD3A:
-	ldr r1, [r1, 0x34]
-	cmp r1, 0
-	bne _081DDD22
-_081DDD40:
-	pop {r4,r5}
-	bx lr
-	thumb_func_end ply_endtie_rev01
-
-	thumb_func_start clear_modM
-clear_modM: @ 81DDD44
-	movs r2, 0
-	strb r2, [r1, 0x16]
-	strb r2, [r1, 0x1A]
-	ldrb r2, [r1, 0x18]
-	cmp r2, 0
-	bne _081DDD54
-	movs r2, 0xC
-	b _081DDD56
-_081DDD54:
-	movs r2, 0x3
-_081DDD56:
-	ldrb r3, [r1]
-	orrs r3, r2
-	strb r3, [r1]
-	bx lr
-	thumb_func_end clear_modM
-
-	thumb_func_start ld_r3_tp_adr_i_rev
-ld_r3_tp_adr_i_rev: @ 81DDD60
-	ldr r2, [r1, 0x40]
-	adds r3, r2, 0x1
-	str r3, [r1, 0x40]
-	ldrb r3, [r2]
-	bx lr
-	thumb_func_end ld_r3_tp_adr_i_rev
-
-	thumb_func_start ply_lfos_rev01
-ply_lfos_rev01: @ 81DDD6C
-	mov r12, lr
-	bl ld_r3_tp_adr_i_rev
-	strb r3, [r1, 0x19]
-	cmp r3, 0
-	bne _081DDD7C
-	bl clear_modM
-_081DDD7C:
-	bx r12
-	thumb_func_end ply_lfos_rev01
-
-	thumb_func_start ply_mod_rev01
-ply_mod_rev01: @ 81DDD80
-	mov r12, lr
-	bl ld_r3_tp_adr_i_rev
-	strb r3, [r1, 0x17]
-	cmp r3, 0
-	bne _081DDD90
-	bl clear_modM
-_081DDD90:
-	bx r12
-	thumb_func_end ply_mod_rev01
-
-	thumb_func_start MidiKey2fr
-MidiKey2fr: @ 81DDD94
-	push {r4-r7,lr}
-	mov r12, r0
-	lsls r1, 24
-	lsrs r6, r1, 24
-	lsls r7, r2, 24
-	cmp r6, 0xB2
-	bls _081DDDA8
-	movs r6, 0xB2
-	movs r7, 0xFF
-	lsls r7, 24
-_081DDDA8:
-	ldr r3, _081DDDF0
-	adds r0, r6, r3
-	ldrb r5, [r0]
-	ldr r4, _081DDDF4
-	movs r2, 0xF
-	adds r0, r5, 0
-	ands r0, r2
-	lsls r0, 2
-	adds r0, r4
-	lsrs r1, r5, 4
-	ldr r5, [r0]
-	lsrs r5, r1
-	adds r0, r6, 0x1
-	adds r0, r3
-	ldrb r1, [r0]
-	adds r0, r1, 0
-	ands r0, r2
-	lsls r0, 2
-	adds r0, r4
-	lsrs r1, 4
-	ldr r0, [r0]
-	lsrs r0, r1
-	mov r1, r12
-	ldr r4, [r1, 0x4]
-	subs r0, r5
-	adds r1, r7, 0
-	bl umul3232H32
-	adds r1, r0, 0
-	adds r1, r5, r1
-	adds r0, r4, 0
-	bl umul3232H32
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_081DDDF0: .4byte gUnknown_0842FA04
-_081DDDF4: .4byte gUnknown_0842FAB8
-	thumb_func_end MidiKey2fr
-
-	thumb_func_start DummyFunc
-DummyFunc: @ 81DDDF8
-	bx lr
-	thumb_func_end DummyFunc
-
-	thumb_func_start MPlayContinue
-MPlayContinue: @ 81DDDFC
-	adds r2, r0, 0
-	ldr r3, [r2, 0x34]
-	ldr r0, _081DDE10
-	cmp r3, r0
-	bne _081DDE0E
-	ldr r0, [r2, 0x4]
-	ldr r1, _081DDE14
-	ands r0, r1
-	str r0, [r2, 0x4]
-_081DDE0E:
-	bx lr
-	.align 2, 0
-_081DDE10: .4byte 0x68736d53
-_081DDE14: .4byte 0x7fffffff
-	thumb_func_end MPlayContinue
-
-	thumb_func_start MPlayFadeOut
-@ void MPlayFadeOut(mplay_table_entry *a1, s16 a2)
-MPlayFadeOut: @ 81DDE18
-	adds r2, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r3, [r2, 0x34]
-	ldr r0, _081DDE34
-	cmp r3, r0
-	bne _081DDE30
-	strh r1, [r2, 0x26]
-	strh r1, [r2, 0x24]
-	movs r0, 0x80
-	lsls r0, 1
-	strh r0, [r2, 0x28]
-_081DDE30:
-	bx lr
-	.align 2, 0
-_081DDE34: .4byte 0x68736d53
-	thumb_func_end MPlayFadeOut
-
-	thumb_func_start m4aSoundInit
-m4aSoundInit: @ 81DDE38
-	push {r4-r6,lr}
-	ldr r0, _081DDEB8
-	movs r1, 0x2
-	negs r1, r1
-	ands r0, r1
-	ldr r1, _081DDEBC
-	ldr r2, _081DDEC0
-	bl CpuSet
-	ldr r0, _081DDEC4
-	bl SoundInit_rev01
-	ldr r0, _081DDEC8
-	bl MPlayExtender
-	ldr r0, _081DDECC
-	bl SoundMode_rev01
-	ldr r0, _081DDED0
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0
-	beq _081DDE86
-	ldr r6, _081DDED4
-	adds r5, r0, 0
-_081DDE6A:
-	ldr r4, [r6]
-	ldr r1, [r6, 0x4]
-	ldrb r2, [r6, 0x8]
-	adds r0, r4, 0
-	bl MPlayOpen_rev01
-	ldrh r0, [r6, 0xA]
-	strb r0, [r4, 0xB]
-	ldr r0, _081DDED8
-	str r0, [r4, 0x18]
-	adds r6, 0xC
-	subs r5, 0x1
-	cmp r5, 0
-	bne _081DDE6A
-_081DDE86:
-	ldr r0, _081DDEDC
-	ldr r1, _081DDEE0
-	movs r2, 0x34
-	bl memcpy
-	movs r5, 0
-	movs r6, 0
-_081DDE94:
-	lsls r0, r5, 6
-	ldr r1, _081DDEE4
-	adds r0, r1
-	ldr r4, _081DDEE8
-	adds r4, r6, r4
-	adds r1, r4, 0
-	movs r2, 0x2
-	bl MPlayOpen_rev01
-	movs r0, 0
-	str r0, [r4, 0x20]
-	adds r6, 0xA0
-	adds r5, 0x1
-	cmp r5, 0x1
-	ble _081DDE94
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DDEB8: .4byte SoundMainRAM
-_081DDEBC: .4byte 0x03000f60
-_081DDEC0: .4byte 0x04000200
-_081DDEC4: .4byte 0x03005fd0
-_081DDEC8: .4byte 0x03007100
-_081DDECC: .4byte 0x0094c500
-_081DDED0: .4byte 0x00000004
-_081DDED4: .4byte gUnknown_0845545C
-_081DDED8: .4byte 0x03007440
-_081DDEDC: .4byte 0x03007340
-_081DDEE0: .4byte gUnknown_0842FC1C
-_081DDEE4: .4byte 0x03006ff0
-_081DDEE8: .4byte 0x03007200
-	thumb_func_end m4aSoundInit
-
-	thumb_func_start m4aSoundMain
-m4aSoundMain: @ 81DDEEC
-	push {lr}
-	bl SoundMain
-	pop {r0}
-	bx r0
-	thumb_func_end m4aSoundMain
-
-	thumb_func_start m4aSongNumStart
-m4aSongNumStart: @ 81DDEF8
-	push {lr}
-	lsls r0, 16
-	ldr r2, _081DDF1C
-	ldr r1, _081DDF20
-	lsrs r0, 13
-	adds r0, r1
-	ldrh r3, [r0, 0x4]
-	lsls r1, r3, 1
-	adds r1, r3
-	lsls r1, 2
-	adds r1, r2
-	ldr r2, [r1]
-	ldr r1, [r0]
-	adds r0, r2, 0
-	bl MPlayStart_rev01
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DDF1C: .4byte gUnknown_0845545C
-_081DDF20: .4byte gUnknown_0845548C
-	thumb_func_end m4aSongNumStart
-
-	thumb_func_start m4aSongNumStartOrChange
-m4aSongNumStartOrChange: @ 81DDF24
-	push {lr}
-	lsls r0, 16
-	ldr r2, _081DDF50
-	ldr r1, _081DDF54
-	lsrs r0, 13
-	adds r0, r1
-	ldrh r3, [r0, 0x4]
-	lsls r1, r3, 1
-	adds r1, r3
-	lsls r1, 2
-	adds r1, r2
-	ldr r1, [r1]
-	ldr r3, [r1]
-	ldr r2, [r0]
-	cmp r3, r2
-	beq _081DDF58
-	adds r0, r1, 0
-	adds r1, r2, 0
-	bl MPlayStart_rev01
-	b _081DDF6C
-	.align 2, 0
-_081DDF50: .4byte gUnknown_0845545C
-_081DDF54: .4byte gUnknown_0845548C
-_081DDF58:
-	ldr r2, [r1, 0x4]
-	ldrh r0, [r1, 0x4]
-	cmp r0, 0
-	beq _081DDF64
-	cmp r2, 0
-	bge _081DDF6C
-_081DDF64:
-	adds r0, r1, 0
-	adds r1, r3, 0
-	bl MPlayStart_rev01
-_081DDF6C:
-	pop {r0}
-	bx r0
-	thumb_func_end m4aSongNumStartOrChange
-
-	thumb_func_start m4aSongNumStartOrContinue
-m4aSongNumStartOrContinue: @ 81DDF70
-	push {lr}
-	lsls r0, 16
-	ldr r2, _081DDF9C
-	ldr r1, _081DDFA0
-	lsrs r0, 13
-	adds r0, r1
-	ldrh r3, [r0, 0x4]
-	lsls r1, r3, 1
-	adds r1, r3
-	lsls r1, 2
-	adds r1, r2
-	ldr r1, [r1]
-	ldr r3, [r1]
-	ldr r2, [r0]
-	cmp r3, r2
-	beq _081DDFA4
-	adds r0, r1, 0
-	adds r1, r2, 0
-	bl MPlayStart_rev01
-	b _081DDFC0
-	.align 2, 0
-_081DDF9C: .4byte gUnknown_0845545C
-_081DDFA0: .4byte gUnknown_0845548C
-_081DDFA4:
-	ldr r2, [r1, 0x4]
-	ldrh r0, [r1, 0x4]
-	cmp r0, 0
-	bne _081DDFB6
-	adds r0, r1, 0
-	adds r1, r3, 0
-	bl MPlayStart_rev01
-	b _081DDFC0
-_081DDFB6:
-	cmp r2, 0
-	bge _081DDFC0
-	adds r0, r1, 0
-	bl MPlayContinue
-_081DDFC0:
-	pop {r0}
-	bx r0
-	thumb_func_end m4aSongNumStartOrContinue
-
-	thumb_func_start m4aSongNumStop
-m4aSongNumStop: @ 81DDFC4
-	push {lr}
-	lsls r0, 16
-	ldr r2, _081DDFF0
-	ldr r1, _081DDFF4
-	lsrs r0, 13
-	adds r0, r1
-	ldrh r3, [r0, 0x4]
-	lsls r1, r3, 1
-	adds r1, r3
-	lsls r1, 2
-	adds r1, r2
-	ldr r2, [r1]
-	ldr r1, [r2]
-	ldr r0, [r0]
-	cmp r1, r0
-	bne _081DDFEA
-	adds r0, r2, 0
-	bl MPlayStop_rev01
-_081DDFEA:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DDFF0: .4byte gUnknown_0845545C
-_081DDFF4: .4byte gUnknown_0845548C
-	thumb_func_end m4aSongNumStop
-
-	thumb_func_start m4aSongNumContinue
-m4aSongNumContinue: @ 81DDFF8
-	push {lr}
-	lsls r0, 16
-	ldr r2, _081DE024
-	ldr r1, _081DE028
-	lsrs r0, 13
-	adds r0, r1
-	ldrh r3, [r0, 0x4]
-	lsls r1, r3, 1
-	adds r1, r3
-	lsls r1, 2
-	adds r1, r2
-	ldr r2, [r1]
-	ldr r1, [r2]
-	ldr r0, [r0]
-	cmp r1, r0
-	bne _081DE01E
-	adds r0, r2, 0
-	bl MPlayContinue
-_081DE01E:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE024: .4byte gUnknown_0845545C
-_081DE028: .4byte gUnknown_0845548C
-	thumb_func_end m4aSongNumContinue
-
-	thumb_func_start m4aMPlayAllStop
-m4aMPlayAllStop: @ 81DE02C
-	push {r4,r5,lr}
-	ldr r0, _081DE064
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0
-	beq _081DE04A
-	ldr r5, _081DE068
-	adds r4, r0, 0
-_081DE03C:
-	ldr r0, [r5]
-	bl MPlayStop_rev01
-	adds r5, 0xC
-	subs r4, 0x1
-	cmp r4, 0
-	bne _081DE03C
-_081DE04A:
-	ldr r5, _081DE06C
-	movs r4, 0x1
-_081DE04E:
-	adds r0, r5, 0
-	bl MPlayStop_rev01
-	adds r5, 0x40
-	subs r4, 0x1
-	cmp r4, 0
-	bge _081DE04E
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE064: .4byte 0x00000004
-_081DE068: .4byte gUnknown_0845545C
-_081DE06C: .4byte 0x03006ff0
-	thumb_func_end m4aMPlayAllStop
-
-	thumb_func_start m4aMPlayContinue
-m4aMPlayContinue: @ 81DE070
-	push {lr}
-	bl MPlayContinue
-	pop {r0}
-	bx r0
-	thumb_func_end m4aMPlayContinue
-
-	thumb_func_start m4aMPlayAllContinue
-m4aMPlayAllContinue: @ 81DE07A
-	push {r4,r5,lr}
-	ldr r0, _081DE0B4
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0
-	beq _081DE09A
-	ldr r5, _081DE0B8
-	adds r4, r0, 0
-_081DE08C:
-	ldr r0, [r5]
-	bl MPlayContinue
-	adds r5, 0xC
-	subs r4, 0x1
-	cmp r4, 0
-	bne _081DE08C
-_081DE09A:
-	ldr r5, _081DE0BC
-	movs r4, 0x1
-_081DE09E:
-	adds r0, r5, 0
-	bl MPlayContinue
-	adds r5, 0x40
-	subs r4, 0x1
-	cmp r4, 0
-	bge _081DE09E
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE0B4: .4byte 0x00000004
-_081DE0B8: .4byte gUnknown_0845545C
-_081DE0BC: .4byte 0x03006ff0
-	thumb_func_end m4aMPlayAllContinue
-
-	thumb_func_start m4aMPlayFadeOut
-@ void m4aMPlayFadeOut(mplay_table_entry *a1, u16 a2)
-m4aMPlayFadeOut: @ 81DE0C0
-	push {lr}
-	lsls r1, 16
-	lsrs r1, 16
-	bl MPlayFadeOut
-	pop {r0}
-	bx r0
-	thumb_func_end m4aMPlayFadeOut
-
-	thumb_func_start sub_81DE0D0
-sub_81DE0D0: @ 81DE0D0
-	adds r2, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r3, [r2, 0x34]
-	ldr r0, _081DE0E8
-	cmp r3, r0
-	bne _081DE0E6
-	strh r1, [r2, 0x26]
-	strh r1, [r2, 0x24]
-	ldr r0, _081DE0EC
-	strh r0, [r2, 0x28]
-_081DE0E6:
-	bx lr
-	.align 2, 0
-_081DE0E8: .4byte 0x68736d53
-_081DE0EC: .4byte 0x00000101
-	thumb_func_end sub_81DE0D0
-
-	thumb_func_start sub_81DE0F0
-sub_81DE0F0: @ 81DE0F0
-	adds r2, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r3, [r2, 0x34]
-	ldr r0, _081DE110
-	cmp r3, r0
-	bne _081DE10E
-	strh r1, [r2, 0x26]
-	strh r1, [r2, 0x24]
-	movs r0, 0x2
-	strh r0, [r2, 0x28]
-	ldr r0, [r2, 0x4]
-	ldr r1, _081DE114
-	ands r0, r1
-	str r0, [r2, 0x4]
-_081DE10E:
-	bx lr
-	.align 2, 0
-_081DE110: .4byte 0x68736d53
-_081DE114: .4byte 0x7fffffff
-	thumb_func_end sub_81DE0F0
-
-	thumb_func_start m4aMPlayImmInit
-m4aMPlayImmInit: @ 81DE118
-	push {r4-r7,lr}
-	ldrb r5, [r0, 0x8]
-	ldr r4, [r0, 0x2C]
-	cmp r5, 0
-	ble _081DE15A
-	movs r7, 0x80
-_081DE124:
-	ldrb r1, [r4]
-	adds r0, r7, 0
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE152
-	movs r6, 0x40
-	adds r0, r6, 0
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE152
-	adds r0, r4, 0
-	bl Clear64byte_rev
-	strb r7, [r4]
-	movs r0, 0x2
-	strb r0, [r4, 0xF]
-	strb r6, [r4, 0x13]
-	movs r0, 0x16
-	strb r0, [r4, 0x19]
-	adds r1, r4, 0
-	adds r1, 0x24
-	movs r0, 0x1
-	strb r0, [r1]
-_081DE152:
-	subs r5, 0x1
-	adds r4, 0x50
-	cmp r5, 0
-	bgt _081DE124
-_081DE15A:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end m4aMPlayImmInit
-
-	thumb_func_start MPlayExtender
-@ int MPlayExtender(void *dest)
-MPlayExtender: @ 81DE160
-	push {r4-r6,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	ldr r1, _081DE228
-	movs r0, 0x8F
-	strh r0, [r1]
-	ldr r3, _081DE22C
-	movs r2, 0
-	strh r2, [r3]
-	ldr r0, _081DE230
-	movs r1, 0x8
-	strb r1, [r0]
-	adds r0, 0x6
-	strb r1, [r0]
-	adds r0, 0x10
-	strb r1, [r0]
-	subs r0, 0x14
-	movs r1, 0x80
-	strb r1, [r0]
-	adds r0, 0x8
-	strb r1, [r0]
-	adds r0, 0x10
-	strb r1, [r0]
-	subs r0, 0xD
-	strb r2, [r0]
-	movs r0, 0x77
-	strb r0, [r3]
-	ldr r0, _081DE234
-	ldr r4, [r0]
-	ldr r6, [r4]
-	ldr r0, _081DE238
-	cmp r6, r0
-	bne _081DE220
-	adds r0, r6, 0x1
-	str r0, [r4]
-	ldr r1, _081DE23C
-	ldr r0, _081DE240
-	str r0, [r1, 0x20]
-	ldr r0, _081DE244
-	str r0, [r1, 0x44]
-	ldr r0, _081DE248
-	str r0, [r1, 0x4C]
-	ldr r0, _081DE24C
-	str r0, [r1, 0x70]
-	ldr r0, _081DE250
-	str r0, [r1, 0x74]
-	ldr r0, _081DE254
-	str r0, [r1, 0x78]
-	ldr r0, _081DE258
-	str r0, [r1, 0x7C]
-	adds r2, r1, 0
-	adds r2, 0x80
-	ldr r0, _081DE25C
-	str r0, [r2]
-	adds r1, 0x84
-	ldr r0, _081DE260
-	str r0, [r1]
-	str r5, [r4, 0x1C]
-	ldr r0, _081DE264
-	str r0, [r4, 0x28]
-	ldr r0, _081DE268
-	str r0, [r4, 0x2C]
-	ldr r0, _081DE26C
-	str r0, [r4, 0x30]
-	ldr r0, _081DE270
-	movs r1, 0
-	strb r0, [r4, 0xC]
-	str r1, [sp]
-	ldr r2, _081DE274
-	mov r0, sp
-	adds r1, r5, 0
-	bl CpuSet
-	movs r0, 0x1
-	strb r0, [r5, 0x1]
-	movs r0, 0x11
-	strb r0, [r5, 0x1C]
-	adds r1, r5, 0
-	adds r1, 0x41
-	movs r0, 0x2
-	strb r0, [r1]
-	adds r1, 0x1B
-	movs r0, 0x22
-	strb r0, [r1]
-	adds r1, 0x25
-	movs r0, 0x3
-	strb r0, [r1]
-	adds r1, 0x1B
-	movs r0, 0x44
-	strb r0, [r1]
-	adds r1, 0x24
-	movs r0, 0x4
-	strb r0, [r1, 0x1]
-	movs r0, 0x88
-	strb r0, [r1, 0x1C]
-	str r6, [r4]
-_081DE220:
-	add sp, 0x4
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE228: .4byte 0x04000084
-_081DE22C: .4byte 0x04000080
-_081DE230: .4byte 0x04000063
-_081DE234: .4byte 0x03007ff0
-_081DE238: .4byte 0x68736d53
-_081DE23C: .4byte 0x03007070
-_081DE240: .4byte ply_memacc
-_081DE244: .4byte ply_lfos_rev01
-_081DE248: .4byte ply_mod_rev01
-_081DE24C: .4byte ply_xcmd
-_081DE250: .4byte ply_endtie_rev01
-_081DE254: .4byte SampFreqSet_rev01
-_081DE258: .4byte TrackStop_rev01
-_081DE25C: .4byte FadeOutBody_rev01
-_081DE260: .4byte TrkVolPitSet_rev01
-_081DE264: .4byte CgbSound
-_081DE268: .4byte CgbOscOff
-_081DE26C: .4byte MidiKey2CgbFr
-_081DE270: .4byte 0x0000003c
-_081DE274: .4byte 0x05000040
-	thumb_func_end MPlayExtender
-
-	thumb_func_start MusicPlayerJumpTableCopy
-MusicPlayerJumpTableCopy: @ 81DE278
-	swi 0x2A
-	bx lr
-	thumb_func_end MusicPlayerJumpTableCopy
-
-	thumb_func_start ClearChain_rev
-ClearChain_rev: @ 81DE27C
-	push {lr}
-	ldr r1, _081DE28C
-	ldr r1, [r1]
-	bl _call_via_r1
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE28C: .4byte 0x030070f8
-	thumb_func_end ClearChain_rev
-
-	thumb_func_start Clear64byte_rev
-Clear64byte_rev: @ 81DE290
-	push {lr}
-	ldr r1, _081DE2A0
-	ldr r1, [r1]
-	bl _call_via_r1
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE2A0: .4byte 0x030070fc
-	thumb_func_end Clear64byte_rev
-
-	thumb_func_start SoundInit_rev01
-@ int SoundInit_rev01(void *dest)
-SoundInit_rev01: @ 81DE2A4
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	movs r3, 0
-	str r3, [r5]
-	ldr r1, _081DE35C
-	ldr r0, [r1]
-	movs r2, 0x80
-	lsls r2, 18
-	ands r0, r2
-	cmp r0, 0
-	beq _081DE2C0
-	ldr r0, _081DE360
-	str r0, [r1]
-_081DE2C0:
-	ldr r1, _081DE364
-	ldr r0, [r1]
-	ands r0, r2
-	cmp r0, 0
-	beq _081DE2CE
-	ldr r0, _081DE360
-	str r0, [r1]
-_081DE2CE:
-	ldr r0, _081DE368
-	movs r2, 0x80
-	lsls r2, 3
-	adds r1, r2, 0
-	strh r1, [r0]
-	adds r0, 0xC
-	strh r1, [r0]
-	ldr r1, _081DE36C
-	movs r0, 0x8F
-	strh r0, [r1]
-	subs r1, 0x2
-	ldr r2, _081DE370
-	adds r0, r2, 0
-	strh r0, [r1]
-	ldr r2, _081DE374
-	ldrb r1, [r2]
-	movs r0, 0x3F
-	ands r0, r1
-	movs r1, 0x40
-	orrs r0, r1
-	strb r0, [r2]
-	ldr r1, _081DE378
-	movs r2, 0xD4
-	lsls r2, 2
-	adds r0, r5, r2
-	str r0, [r1]
-	adds r1, 0x4
-	ldr r0, _081DE37C
-	str r0, [r1]
-	adds r1, 0x8
-	movs r2, 0x98
-	lsls r2, 4
-	adds r0, r5, r2
-	str r0, [r1]
-	adds r1, 0x4
-	ldr r0, _081DE380
-	str r0, [r1]
-	ldr r0, _081DE384
-	str r5, [r0]
-	str r3, [sp]
-	ldr r2, _081DE388
-	mov r0, sp
-	adds r1, r5, 0
-	bl CpuSet
-	movs r0, 0x8
-	strb r0, [r5, 0x6]
-	movs r0, 0xF
-	strb r0, [r5, 0x7]
-	ldr r0, _081DE38C
-	str r0, [r5, 0x38]
-	ldr r0, _081DE390
-	str r0, [r5, 0x28]
-	str r0, [r5, 0x2C]
-	str r0, [r5, 0x30]
-	str r0, [r5, 0x3C]
-	ldr r4, _081DE394
-	adds r0, r4, 0
-	bl MPlyJmpTblCopy
-	str r4, [r5, 0x34]
-	movs r0, 0x80
-	lsls r0, 11
-	bl SampFreqSet_rev01
-	ldr r0, _081DE398
-	str r0, [r5]
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE35C: .4byte 0x040000c4
-_081DE360: .4byte 0x84400004
-_081DE364: .4byte 0x040000d0
-_081DE368: .4byte 0x040000c6
-_081DE36C: .4byte 0x04000084
-_081DE370: .4byte 0x0000a90e
-_081DE374: .4byte 0x04000089
-_081DE378: .4byte 0x040000bc
-_081DE37C: .4byte 0x040000a0
-_081DE380: .4byte 0x040000a4
-_081DE384: .4byte 0x03007ff0
-_081DE388: .4byte 0x050003ec
-_081DE38C: .4byte ply_note_rev01
-_081DE390: .4byte DummyFunc_rev
-_081DE394: .4byte 0x03007070
-_081DE398: .4byte 0x68736d53
-	thumb_func_end SoundInit_rev01
-
-	thumb_func_start SampFreqSet_rev01
-SampFreqSet_rev01: @ 81DE39C
-	push {r4-r6,lr}
-	adds r2, r0, 0
-	ldr r0, _081DE41C
-	ldr r4, [r0]
-	movs r0, 0xF0
-	lsls r0, 12
-	ands r0, r2
-	lsrs r2, r0, 16
-	movs r6, 0
-	strb r2, [r4, 0x8]
-	ldr r1, _081DE420
-	subs r0, r2, 0x1
-	lsls r0, 1
-	adds r0, r1
-	ldrh r5, [r0]
-	str r5, [r4, 0x10]
-	movs r0, 0xC6
-	lsls r0, 3
-	adds r1, r5, 0
-	bl __divsi3
-	strb r0, [r4, 0xB]
-	ldr r0, _081DE424
-	muls r0, r5
-	ldr r1, _081DE428
-	adds r0, r1
-	ldr r1, _081DE42C
-	bl __divsi3
-	adds r1, r0, 0
-	str r1, [r4, 0x14]
-	movs r0, 0x80
-	lsls r0, 17
-	bl __divsi3
-	adds r0, 0x1
-	asrs r0, 1
-	str r0, [r4, 0x18]
-	ldr r0, _081DE430
-	strh r6, [r0]
-	ldr r4, _081DE434
-	ldr r0, _081DE438
-	adds r1, r5, 0
-	bl __divsi3
-	negs r0, r0
-	strh r0, [r4]
-	bl SoundVSyncOn_rev01
-	ldr r1, _081DE43C
-_081DE400:
-	ldrb r0, [r1]
-	cmp r0, 0x9F
-	beq _081DE400
-	ldr r1, _081DE43C
-_081DE408:
-	ldrb r0, [r1]
-	cmp r0, 0x9F
-	bne _081DE408
-	ldr r1, _081DE430
-	movs r0, 0x80
-	strh r0, [r1]
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE41C: .4byte 0x03007ff0
-_081DE420: .4byte gUnknown_0842FAE8
-_081DE424: .4byte 0x00091d1b
-_081DE428: .4byte 0x00001388
-_081DE42C: .4byte 0x00002710
-_081DE430: .4byte 0x04000102
-_081DE434: .4byte 0x04000100
-_081DE438: .4byte 0x00044940
-_081DE43C: .4byte 0x04000006
-	thumb_func_end SampFreqSet_rev01
-
-	thumb_func_start SoundMode_rev01
-SoundMode_rev01: @ 81DE440
-	push {r4,r5,lr}
-	adds r3, r0, 0
-	ldr r0, _081DE4CC
-	ldr r5, [r0]
-	ldr r1, [r5]
-	ldr r0, _081DE4D0
-	cmp r1, r0
-	bne _081DE4C6
-	adds r0, r1, 0x1
-	str r0, [r5]
-	movs r4, 0xFF
-	ands r4, r3
-	cmp r4, 0
-	beq _081DE462
-	movs r0, 0x7F
-	ands r4, r0
-	strb r4, [r5, 0x5]
-_081DE462:
-	movs r4, 0xF0
-	lsls r4, 4
-	ands r4, r3
-	cmp r4, 0
-	beq _081DE482
-	lsrs r0, r4, 8
-	strb r0, [r5, 0x6]
-	movs r4, 0xC
-	adds r0, r5, 0
-	adds r0, 0x50
-	movs r1, 0
-_081DE478:
-	strb r1, [r0]
-	subs r4, 0x1
-	adds r0, 0x40
-	cmp r4, 0
-	bne _081DE478
-_081DE482:
-	movs r4, 0xF0
-	lsls r4, 8
-	ands r4, r3
-	cmp r4, 0
-	beq _081DE490
-	lsrs r0, r4, 12
-	strb r0, [r5, 0x7]
-_081DE490:
-	movs r4, 0xB0
-	lsls r4, 16
-	ands r4, r3
-	cmp r4, 0
-	beq _081DE4AE
-	movs r0, 0xC0
-	lsls r0, 14
-	ands r0, r4
-	lsrs r4, r0, 14
-	ldr r2, _081DE4D4
-	ldrb r1, [r2]
-	movs r0, 0x3F
-	ands r0, r1
-	orrs r0, r4
-	strb r0, [r2]
-_081DE4AE:
-	movs r4, 0xF0
-	lsls r4, 12
-	ands r4, r3
-	cmp r4, 0
-	beq _081DE4C2
-	bl SoundVSyncOff_rev01
-	adds r0, r4, 0
-	bl SampFreqSet_rev01
-_081DE4C2:
-	ldr r0, _081DE4D0
-	str r0, [r5]
-_081DE4C6:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE4CC: .4byte 0x03007ff0
-_081DE4D0: .4byte 0x68736d53
-_081DE4D4: .4byte 0x04000089
-	thumb_func_end SoundMode_rev01
-
-	thumb_func_start SoundClear_rev01
-SoundClear_rev01: @ 81DE4D8
-	push {r4-r7,lr}
-	ldr r0, _081DE524
-	ldr r6, [r0]
-	ldr r1, [r6]
-	ldr r0, _081DE528
-	cmp r1, r0
-	bne _081DE51E
-	adds r0, r1, 0x1
-	str r0, [r6]
-	movs r5, 0xC
-	adds r4, r6, 0
-	adds r4, 0x50
-	movs r0, 0
-_081DE4F2:
-	strb r0, [r4]
-	subs r5, 0x1
-	adds r4, 0x40
-	cmp r5, 0
-	bgt _081DE4F2
-	ldr r4, [r6, 0x1C]
-	cmp r4, 0
-	beq _081DE51A
-	movs r5, 0x1
-	movs r7, 0
-_081DE506:
-	lsls r0, r5, 24
-	lsrs r0, 24
-	ldr r1, [r6, 0x2C]
-	bl _call_via_r1
-	strb r7, [r4]
-	adds r5, 0x1
-	adds r4, 0x40
-	cmp r5, 0x4
-	ble _081DE506
-_081DE51A:
-	ldr r0, _081DE528
-	str r0, [r6]
-_081DE51E:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE524: .4byte 0x03007ff0
-_081DE528: .4byte 0x68736d53
-	thumb_func_end SoundClear_rev01
-
-	thumb_func_start SoundVSyncOff_rev01
-SoundVSyncOff_rev01: @ 81DE52C
-	push {lr}
-	sub sp, 0x4
-	ldr r0, _081DE58C
-	ldr r2, [r0]
-	ldr r1, [r2]
-	ldr r3, _081DE590
-	adds r0, r1, r3
-	cmp r0, 0x1
-	bhi _081DE584
-	adds r0, r1, 0
-	adds r0, 0xA
-	str r0, [r2]
-	ldr r1, _081DE594
-	ldr r0, [r1]
-	movs r3, 0x80
-	lsls r3, 18
-	ands r0, r3
-	cmp r0, 0
-	beq _081DE556
-	ldr r0, _081DE598
-	str r0, [r1]
-_081DE556:
-	ldr r1, _081DE59C
-	ldr r0, [r1]
-	ands r0, r3
-	cmp r0, 0
-	beq _081DE564
-	ldr r0, _081DE598
-	str r0, [r1]
-_081DE564:
-	ldr r0, _081DE5A0
-	movs r3, 0x80
-	lsls r3, 3
-	adds r1, r3, 0
-	strh r1, [r0]
-	adds r0, 0xC
-	strh r1, [r0]
-	movs r0, 0
-	str r0, [sp]
-	movs r0, 0xD4
-	lsls r0, 2
-	adds r1, r2, r0
-	ldr r2, _081DE5A4
-	mov r0, sp
-	bl CpuSet
-_081DE584:
-	add sp, 0x4
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE58C: .4byte 0x03007ff0
-_081DE590: .4byte 0x978c92ad
-_081DE594: .4byte 0x040000c4
-_081DE598: .4byte 0x84400004
-_081DE59C: .4byte 0x040000d0
-_081DE5A0: .4byte 0x040000c6
-_081DE5A4: .4byte 0x05000318
-	thumb_func_end SoundVSyncOff_rev01
-
-	thumb_func_start SoundVSyncOn_rev01
-SoundVSyncOn_rev01: @ 81DE5A8
-	push {r4,lr}
-	ldr r0, _081DE5D8
-	ldr r2, [r0]
-	ldr r3, [r2]
-	ldr r0, _081DE5DC
-	cmp r3, r0
-	beq _081DE5D0
-	ldr r0, _081DE5E0
-	movs r4, 0xB6
-	lsls r4, 8
-	adds r1, r4, 0
-	strh r1, [r0]
-	adds r0, 0xC
-	strh r1, [r0]
-	ldrb r0, [r2, 0x4]
-	movs r0, 0
-	strb r0, [r2, 0x4]
-	adds r0, r3, 0
-	subs r0, 0xA
-	str r0, [r2]
-_081DE5D0:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE5D8: .4byte 0x03007ff0
-_081DE5DC: .4byte 0x68736d53
-_081DE5E0: .4byte 0x040000c6
-	thumb_func_end SoundVSyncOn_rev01
-
-	thumb_func_start MPlayOpen_rev01
-MPlayOpen_rev01: @ 81DE5E4
-	push {r4-r7,lr}
-	adds r7, r0, 0
-	adds r6, r1, 0
-	lsls r2, 24
-	lsrs r4, r2, 24
-	cmp r4, 0
-	beq _081DE648
-	cmp r4, 0x10
-	bls _081DE5F8
-	movs r4, 0x10
-_081DE5F8:
-	ldr r0, _081DE650
-	ldr r5, [r0]
-	ldr r1, [r5]
-	ldr r0, _081DE654
-	cmp r1, r0
-	bne _081DE648
-	adds r0, r1, 0x1
-	str r0, [r5]
-	adds r0, r7, 0
-	bl Clear64byte_rev
-	str r6, [r7, 0x2C]
-	strb r4, [r7, 0x8]
-	movs r0, 0x80
-	lsls r0, 24
-	str r0, [r7, 0x4]
-	cmp r4, 0
-	beq _081DE62C
-	movs r1, 0
-_081DE61E:
-	strb r1, [r6]
-	subs r0, r4, 0x1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	adds r6, 0x50
-	cmp r4, 0
-	bne _081DE61E
-_081DE62C:
-	ldr r0, [r5, 0x20]
-	cmp r0, 0
-	beq _081DE63C
-	str r0, [r7, 0x38]
-	ldr r0, [r5, 0x24]
-	str r0, [r7, 0x3C]
-	movs r0, 0
-	str r0, [r5, 0x20]
-_081DE63C:
-	str r7, [r5, 0x24]
-	ldr r0, _081DE658
-	str r0, [r5, 0x20]
-	ldr r0, _081DE654
-	str r0, [r5]
-	str r0, [r7, 0x34]
-_081DE648:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE650: .4byte 0x03007ff0
-_081DE654: .4byte 0x68736d53
-_081DE658: .4byte MPlayMain_rev01
-	thumb_func_end MPlayOpen_rev01
-
-	thumb_func_start MPlayStart_rev01
-MPlayStart_rev01: @ 81DE65C
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	adds r5, r0, 0
-	adds r7, r1, 0
-	ldr r1, [r5, 0x34]
-	ldr r0, _081DE73C
-	cmp r1, r0
-	bne _081DE732
-	ldrb r0, [r5, 0xB]
-	ldrb r2, [r7, 0x2]
-	cmp r0, 0
-	beq _081DE69E
-	ldr r0, [r5]
-	cmp r0, 0
-	beq _081DE688
-	ldr r1, [r5, 0x2C]
-	movs r0, 0x40
-	ldrb r1, [r1]
-	ands r0, r1
-	cmp r0, 0
-	bne _081DE694
-_081DE688:
-	ldr r1, [r5, 0x4]
-	ldrh r0, [r5, 0x4]
-	cmp r0, 0
-	beq _081DE69E
-	cmp r1, 0
-	blt _081DE69E
-_081DE694:
-	ldrb r0, [r7, 0x2]
-	adds r2, r0, 0
-	ldrb r0, [r5, 0x9]
-	cmp r0, r2
-	bhi _081DE732
-_081DE69E:
-	ldr r0, [r5, 0x34]
-	adds r0, 0x1
-	str r0, [r5, 0x34]
-	movs r1, 0
-	str r1, [r5, 0x4]
-	str r7, [r5]
-	ldr r0, [r7, 0x4]
-	str r0, [r5, 0x30]
-	strb r2, [r5, 0x9]
-	str r1, [r5, 0xC]
-	movs r0, 0x96
-	strh r0, [r5, 0x1C]
-	strh r0, [r5, 0x20]
-	adds r0, 0x6A
-	strh r0, [r5, 0x1E]
-	strh r1, [r5, 0x22]
-	strh r1, [r5, 0x24]
-	movs r6, 0
-	ldr r4, [r5, 0x2C]
-	ldrb r1, [r7]
-	cmp r6, r1
-	bge _081DE6FE
-	ldrb r0, [r5, 0x8]
-	cmp r6, r0
-	bge _081DE71E
-	mov r8, r6
-_081DE6D2:
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl TrackStop_rev01
-	movs r0, 0xC0
-	strb r0, [r4]
-	mov r1, r8
-	str r1, [r4, 0x20]
-	lsls r1, r6, 2
-	adds r0, r7, 0
-	adds r0, 0x8
-	adds r0, r1
-	ldr r0, [r0]
-	str r0, [r4, 0x40]
-	adds r6, 0x1
-	adds r4, 0x50
-	ldrb r0, [r7]
-	cmp r6, r0
-	bge _081DE6FE
-	ldrb r1, [r5, 0x8]
-	cmp r6, r1
-	blt _081DE6D2
-_081DE6FE:
-	ldrb r0, [r5, 0x8]
-	cmp r6, r0
-	bge _081DE71E
-	movs r1, 0
-	mov r8, r1
-_081DE708:
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl TrackStop_rev01
-	mov r0, r8
-	strb r0, [r4]
-	adds r6, 0x1
-	adds r4, 0x50
-	ldrb r1, [r5, 0x8]
-	cmp r6, r1
-	blt _081DE708
-_081DE71E:
-	movs r0, 0x80
-	ldrb r1, [r7, 0x3]
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE72E
-	ldrb r0, [r7, 0x3]
-	bl SoundMode_rev01
-_081DE72E:
-	ldr r0, _081DE73C
-	str r0, [r5, 0x34]
-_081DE732:
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE73C: .4byte 0x68736d53
-	thumb_func_end MPlayStart_rev01
-
-	thumb_func_start MPlayStop_rev01
-MPlayStop_rev01: @ 81DE740
-	push {r4-r6,lr}
-	adds r6, r0, 0
-	ldr r1, [r6, 0x34]
-	ldr r0, _081DE77C
-	cmp r1, r0
-	bne _081DE776
-	adds r0, r1, 0x1
-	str r0, [r6, 0x34]
-	ldr r0, [r6, 0x4]
-	movs r1, 0x80
-	lsls r1, 24
-	orrs r0, r1
-	str r0, [r6, 0x4]
-	ldrb r4, [r6, 0x8]
-	ldr r5, [r6, 0x2C]
-	cmp r4, 0
-	ble _081DE772
-_081DE762:
-	adds r0, r6, 0
-	adds r1, r5, 0
-	bl TrackStop_rev01
-	subs r4, 0x1
-	adds r5, 0x50
-	cmp r4, 0
-	bgt _081DE762
-_081DE772:
-	ldr r0, _081DE77C
-	str r0, [r6, 0x34]
-_081DE776:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DE77C: .4byte 0x68736d53
-	thumb_func_end MPlayStop_rev01
-
-	thumb_func_start FadeOutBody_rev01
-FadeOutBody_rev01: @ 81DE780
-	push {r4-r7,lr}
-	adds r6, r0, 0
-	ldrh r1, [r6, 0x24]
-	cmp r1, 0
-	beq _081DE842
-	ldrh r0, [r6, 0x26]
-	subs r0, 0x1
-	strh r0, [r6, 0x26]
-	ldr r3, _081DE7C0
-	adds r2, r3, 0
-	lsls r0, 16
-	lsrs r3, r0, 16
-	cmp r3, 0
-	bne _081DE842
-	strh r1, [r6, 0x26]
-	ldrh r1, [r6, 0x28]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE7C4
-	adds r0, r1, 0
-	adds r0, 0x10
-	strh r0, [r6, 0x28]
-	ands r0, r2
-	cmp r0, 0xFF
-	bls _081DE816
-	movs r0, 0x80
-	lsls r0, 1
-	strh r0, [r6, 0x28]
-	strh r3, [r6, 0x24]
-	b _081DE816
-	.align 2, 0
-_081DE7C0: .4byte 0x0000ffff
-_081DE7C4:
-	adds r0, r1, 0
-	subs r0, 0x10
-	strh r0, [r6, 0x28]
-	ands r0, r2
-	lsls r0, 16
-	cmp r0, 0
-	bgt _081DE816
-	ldrb r5, [r6, 0x8]
-	ldr r4, [r6, 0x2C]
-	cmp r5, 0
-	ble _081DE7F6
-_081DE7DA:
-	adds r0, r6, 0
-	adds r1, r4, 0
-	bl TrackStop_rev01
-	movs r0, 0x1
-	ldrh r7, [r6, 0x28]
-	ands r0, r7
-	cmp r0, 0
-	bne _081DE7EE
-	strb r0, [r4]
-_081DE7EE:
-	subs r5, 0x1
-	adds r4, 0x50
-	cmp r5, 0
-	bgt _081DE7DA
-_081DE7F6:
-	movs r0, 0x1
-	ldrh r1, [r6, 0x28]
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE80A
-	ldr r0, [r6, 0x4]
-	movs r1, 0x80
-	lsls r1, 24
-	orrs r0, r1
-	b _081DE80E
-_081DE80A:
-	movs r0, 0x80
-	lsls r0, 24
-_081DE80E:
-	str r0, [r6, 0x4]
-	movs r0, 0
-	strh r0, [r6, 0x24]
-	b _081DE842
-_081DE816:
-	ldrb r5, [r6, 0x8]
-	ldr r4, [r6, 0x2C]
-	cmp r5, 0
-	ble _081DE842
-	movs r3, 0x80
-	movs r7, 0
-	movs r2, 0x3
-_081DE824:
-	ldrb r1, [r4]
-	adds r0, r3, 0
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE83A
-	ldrh r7, [r6, 0x28]
-	lsrs r0, r7, 2
-	strb r0, [r4, 0x13]
-	adds r0, r1, 0
-	orrs r0, r2
-	strb r0, [r4]
-_081DE83A:
-	subs r5, 0x1
-	adds r4, 0x50
-	cmp r5, 0
-	bgt _081DE824
-_081DE842:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end FadeOutBody_rev01
-
-	thumb_func_start TrkVolPitSet_rev01
-TrkVolPitSet_rev01: @ 81DE848
-	push {r4,lr}
-	adds r2, r1, 0
-	movs r0, 0x1
-	ldrb r1, [r2]
-	ands r0, r1
-	cmp r0, 0
-	beq _081DE8AC
-	ldrb r3, [r2, 0x13]
-	ldrb r1, [r2, 0x12]
-	adds r0, r3, 0
-	muls r0, r1
-	lsrs r3, r0, 5
-	ldrb r4, [r2, 0x18]
-	cmp r4, 0x1
-	bne _081DE870
-	movs r0, 0x16
-	ldrsb r0, [r2, r0]
-	adds r0, 0x80
-	muls r0, r3
-	lsrs r3, r0, 7
-_081DE870:
-	movs r0, 0x14
-	ldrsb r0, [r2, r0]
-	lsls r0, 1
-	movs r1, 0x15
-	ldrsb r1, [r2, r1]
-	adds r1, r0, r1
-	cmp r4, 0x2
-	bne _081DE886
-	movs r0, 0x16
-	ldrsb r0, [r2, r0]
-	adds r1, r0
-_081DE886:
-	movs r0, 0x80
-	negs r0, r0
-	cmp r1, r0
-	bge _081DE892
-	adds r1, r0, 0
-	b _081DE898
-_081DE892:
-	cmp r1, 0x7F
-	ble _081DE898
-	movs r1, 0x7F
-_081DE898:
-	adds r0, r1, 0
-	adds r0, 0x80
-	muls r0, r3
-	lsrs r0, 8
-	strb r0, [r2, 0x10]
-	movs r0, 0x7F
-	subs r0, r1
-	muls r0, r3
-	lsrs r0, 8
-	strb r0, [r2, 0x11]
-_081DE8AC:
-	ldrb r1, [r2]
-	movs r0, 0x4
-	ands r0, r1
-	adds r3, r1, 0
-	cmp r0, 0
-	beq _081DE8F0
-	movs r0, 0xE
-	ldrsb r0, [r2, r0]
-	ldrb r1, [r2, 0xF]
-	muls r0, r1
-	movs r1, 0xC
-	ldrsb r1, [r2, r1]
-	adds r1, r0
-	lsls r1, 2
-	movs r0, 0xA
-	ldrsb r0, [r2, r0]
-	lsls r0, 8
-	adds r1, r0
-	movs r0, 0xB
-	ldrsb r0, [r2, r0]
-	lsls r0, 8
-	adds r1, r0
-	ldrb r0, [r2, 0xD]
-	adds r1, r0, r1
-	ldrb r0, [r2, 0x18]
-	cmp r0, 0
-	bne _081DE8EA
-	movs r0, 0x16
-	ldrsb r0, [r2, r0]
-	lsls r0, 4
-	adds r1, r0
-_081DE8EA:
-	asrs r0, r1, 8
-	strb r0, [r2, 0x8]
-	strb r1, [r2, 0x9]
-_081DE8F0:
-	movs r0, 0xFA
-	ands r0, r3
-	strb r0, [r2]
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end TrkVolPitSet_rev01
-
-	thumb_func_start MidiKey2CgbFr
-MidiKey2CgbFr: @ 81DE8FC
-	push {r4-r7,lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r5, r1, 24
-	lsls r2, 24
-	lsrs r2, 24
-	mov r12, r2
-	cmp r0, 0x4
-	bne _081DE934
-	cmp r5, 0x14
-	bhi _081DE918
-	movs r5, 0
-	b _081DE926
-_081DE918:
-	adds r0, r5, 0
-	subs r0, 0x15
-	lsls r0, 24
-	lsrs r5, r0, 24
-	cmp r5, 0x3B
-	bls _081DE926
-	movs r5, 0x3B
-_081DE926:
-	ldr r0, _081DE930
-	adds r0, r5, r0
-	ldrb r0, [r0]
-	b _081DE996
-	.align 2, 0
-_081DE930: .4byte gUnknown_0842FB9C
-_081DE934:
-	cmp r5, 0x23
-	bhi _081DE940
-	movs r0, 0
-	mov r12, r0
-	movs r5, 0
-	b _081DE952
-_081DE940:
-	adds r0, r5, 0
-	subs r0, 0x24
-	lsls r0, 24
-	lsrs r5, r0, 24
-	cmp r5, 0x82
-	bls _081DE952
-	movs r5, 0x82
-	movs r1, 0xFF
-	mov r12, r1
-_081DE952:
-	ldr r3, _081DE99C
-	adds r0, r5, r3
-	ldrb r6, [r0]
-	ldr r4, _081DE9A0
-	movs r2, 0xF
-	adds r0, r6, 0
-	ands r0, r2
-	lsls r0, 1
-	adds r0, r4
-	movs r7, 0
-	ldrsh r1, [r0, r7]
-	asrs r0, r6, 4
-	adds r6, r1, 0
-	asrs r6, r0
-	adds r0, r5, 0x1
-	adds r0, r3
-	ldrb r1, [r0]
-	adds r0, r1, 0
-	ands r0, r2
-	lsls r0, 1
-	adds r0, r4
-	movs r2, 0
-	ldrsh r0, [r0, r2]
-	asrs r1, 4
-	asrs r0, r1
-	subs r0, r6
-	mov r7, r12
-	muls r7, r0
-	adds r0, r7, 0
-	asrs r0, 8
-	adds r0, r6, r0
-	movs r1, 0x80
-	lsls r1, 4
-	adds r0, r1
-_081DE996:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_081DE99C: .4byte gUnknown_0842FB00
-_081DE9A0: .4byte gUnknown_0842FB84
-	thumb_func_end MidiKey2CgbFr
-
-	thumb_func_start CgbOscOff
-CgbOscOff: @ 81DE9A4
-	lsls r0, 24
-	lsrs r0, 24
-	adds r1, r0, 0
-	cmp r0, 0x2
-	beq _081DE9CC
-	cmp r0, 0x2
-	bgt _081DE9B8
-	cmp r0, 0x1
-	beq _081DE9BE
-	b _081DE9E0
-_081DE9B8:
-	cmp r1, 0x3
-	beq _081DE9D4
-	b _081DE9E0
-_081DE9BE:
-	ldr r1, _081DE9C8
-	movs r0, 0x8
-	strb r0, [r1]
-	adds r1, 0x2
-	b _081DE9E8
-	.align 2, 0
-_081DE9C8: .4byte 0x04000063
-_081DE9CC:
-	ldr r1, _081DE9D0
-	b _081DE9E2
-	.align 2, 0
-_081DE9D0: .4byte 0x04000069
-_081DE9D4:
-	ldr r1, _081DE9DC
-	movs r0, 0
-	b _081DE9EA
-	.align 2, 0
-_081DE9DC: .4byte 0x04000070
-_081DE9E0:
-	ldr r1, _081DE9F0
-_081DE9E2:
-	movs r0, 0x8
-	strb r0, [r1]
-	adds r1, 0x4
-_081DE9E8:
-	movs r0, 0x80
-_081DE9EA:
-	strb r0, [r1]
-	bx lr
-	.align 2, 0
-_081DE9F0: .4byte 0x04000079
-	thumb_func_end CgbOscOff
-
-	thumb_func_start CgbModVol
-CgbModVol: @ 81DE9F4
-	push {r4,lr}
-	adds r2, r0, 0
-	ldr r0, _081DEA24
-	ldr r1, [r0]
-	movs r0, 0x1
-	ldrb r1, [r1, 0x9]
-	ands r0, r1
-	cmp r0, 0
-	bne _081DEA34
-	ldrb r0, [r2, 0x2]
-	lsls r1, r0, 24
-	lsrs r4, r1, 24
-	ldrb r3, [r2, 0x3]
-	lsls r0, r3, 24
-	lsrs r3, r0, 24
-	cmp r4, r3
-	bcc _081DEA28
-	lsrs r0, r1, 25
-	cmp r0, r3
-	bcc _081DEA34
-	movs r0, 0xF
-	strb r0, [r2, 0x1B]
-	b _081DEA42
-	.align 2, 0
-_081DEA24: .4byte 0x03007ff0
-_081DEA28:
-	lsrs r0, 25
-	cmp r0, r4
-	bcc _081DEA34
-	movs r0, 0xF0
-	strb r0, [r2, 0x1B]
-	b _081DEA42
-_081DEA34:
-	movs r0, 0xFF
-	strb r0, [r2, 0x1B]
-	ldrb r1, [r2, 0x3]
-	ldrb r3, [r2, 0x2]
-	adds r0, r1, r3
-	lsrs r0, 4
-	b _081DEA52
-_081DEA42:
-	ldrb r1, [r2, 0x3]
-	ldrb r3, [r2, 0x2]
-	adds r0, r1, r3
-	lsrs r0, 4
-	strb r0, [r2, 0xA]
-	cmp r0, 0xF
-	bls _081DEA54
-	movs r0, 0xF
-_081DEA52:
-	strb r0, [r2, 0xA]
-_081DEA54:
-	ldrb r1, [r2, 0x6]
-	ldrb r3, [r2, 0xA]
-	adds r0, r1, 0
-	muls r0, r3
-	adds r0, 0xF
-	asrs r0, 4
-	strb r0, [r2, 0x19]
-	ldrb r0, [r2, 0x1C]
-	ldrb r1, [r2, 0x1B]
-	ands r0, r1
-	strb r0, [r2, 0x1B]
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end CgbModVol
-
-	thumb_func_start CgbSound
-CgbSound: @ 81DEA70
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x1C
-	ldr r0, _081DEA90
-	ldr r0, [r0]
-	str r0, [sp, 0x4]
-	ldrb r0, [r0, 0xA]
-	cmp r0, 0
-	beq _081DEA94
-	subs r0, 0x1
-	ldr r1, [sp, 0x4]
-	strb r0, [r1, 0xA]
-	b _081DEA9A
-	.align 2, 0
-_081DEA90: .4byte 0x03007ff0
-_081DEA94:
-	movs r0, 0xE
-	ldr r2, [sp, 0x4]
-	strb r0, [r2, 0xA]
-_081DEA9A:
-	movs r6, 0x1
-	ldr r0, [sp, 0x4]
-	ldr r4, [r0, 0x1C]
-_081DEAA0:
-	ldrb r1, [r4]
-	movs r0, 0xC7
-	ands r0, r1
-	adds r2, r6, 0x1
-	mov r10, r2
-	movs r2, 0x40
-	adds r2, r4
-	mov r9, r2
-	cmp r0, 0
-	bne _081DEAB6
-	b _081DEEA0
-_081DEAB6:
-	cmp r6, 0x2
-	beq _081DEAE8
-	cmp r6, 0x2
-	bgt _081DEAC4
-	cmp r6, 0x1
-	beq _081DEACA
-	b _081DEB20
-_081DEAC4:
-	cmp r6, 0x3
-	beq _081DEB00
-	b _081DEB20
-_081DEACA:
-	ldr r0, _081DEADC
-	str r0, [sp, 0x8]
-	ldr r7, _081DEAE0
-	ldr r2, _081DEAE4
-	str r2, [sp, 0xC]
-	adds r0, 0x4
-	str r0, [sp, 0x10]
-	adds r2, 0x2
-	b _081DEB30
-	.align 2, 0
-_081DEADC: .4byte 0x04000060
-_081DEAE0: .4byte 0x04000062
-_081DEAE4: .4byte 0x04000063
-_081DEAE8:
-	ldr r0, _081DEAF4
-	str r0, [sp, 0x8]
-	ldr r7, _081DEAF8
-	ldr r2, _081DEAFC
-	b _081DEB28
-	.align 2, 0
-_081DEAF4: .4byte 0x04000061
-_081DEAF8: .4byte 0x04000068
-_081DEAFC: .4byte 0x04000069
-_081DEB00:
-	ldr r0, _081DEB14
-	str r0, [sp, 0x8]
-	ldr r7, _081DEB18
-	ldr r2, _081DEB1C
-	str r2, [sp, 0xC]
-	adds r0, 0x4
-	str r0, [sp, 0x10]
-	adds r2, 0x2
-	b _081DEB30
-	.align 2, 0
-_081DEB14: .4byte 0x04000070
-_081DEB18: .4byte 0x04000072
-_081DEB1C: .4byte 0x04000073
-_081DEB20:
-	ldr r0, _081DEB80
-	str r0, [sp, 0x8]
-	ldr r7, _081DEB84
-	ldr r2, _081DEB88
-_081DEB28:
-	str r2, [sp, 0xC]
-	adds r0, 0xB
-	str r0, [sp, 0x10]
-	adds r2, 0x4
-_081DEB30:
-	str r2, [sp, 0x14]
-	ldr r0, [sp, 0x4]
-	ldrb r0, [r0, 0xA]
-	str r0, [sp]
-	ldr r2, [sp, 0xC]
-	ldrb r0, [r2]
-	mov r8, r0
-	adds r2, r1, 0
-	movs r0, 0x80
-	ands r0, r2
-	cmp r0, 0
-	beq _081DEC26
-	movs r3, 0x40
-	adds r0, r3, 0
-	ands r0, r2
-	lsls r0, 24
-	lsrs r5, r0, 24
-	adds r0, r6, 0x1
-	mov r10, r0
-	movs r1, 0x40
-	adds r1, r4
-	mov r9, r1
-	cmp r5, 0
-	bne _081DEC4A
-	movs r0, 0x3
-	strb r0, [r4]
-	strb r0, [r4, 0x1D]
-	adds r0, r4, 0
-	str r3, [sp, 0x18]
-	bl CgbModVol
-	ldr r3, [sp, 0x18]
-	cmp r6, 0x2
-	beq _081DEB98
-	cmp r6, 0x2
-	bgt _081DEB8C
-	cmp r6, 0x1
-	beq _081DEB92
-	b _081DEBEC
-	.align 2, 0
-_081DEB80: .4byte 0x04000071
-_081DEB84: .4byte 0x04000078
-_081DEB88: .4byte 0x04000079
-_081DEB8C:
-	cmp r6, 0x3
-	beq _081DEBA4
-	b _081DEBEC
-_081DEB92:
-	ldrb r0, [r4, 0x1F]
-	ldr r2, [sp, 0x8]
-	strb r0, [r2]
-_081DEB98:
-	ldr r0, [r4, 0x24]
-	lsls r0, 6
-	ldrb r1, [r4, 0x1E]
-	adds r0, r1, r0
-	strb r0, [r7]
-	b _081DEBF8
-_081DEBA4:
-	ldr r1, [r4, 0x24]
-	ldr r0, [r4, 0x28]
-	cmp r1, r0
-	beq _081DEBCC
-	ldr r2, [sp, 0x8]
-	strb r3, [r2]
-	ldr r1, _081DEBE0
-	ldr r2, [r4, 0x24]
-	ldr r0, [r2]
-	str r0, [r1]
-	adds r1, 0x4
-	ldr r0, [r2, 0x4]
-	str r0, [r1]
-	adds r1, 0x4
-	ldr r0, [r2, 0x8]
-	str r0, [r1]
-	adds r1, 0x4
-	ldr r0, [r2, 0xC]
-	str r0, [r1]
-	str r2, [r4, 0x28]
-_081DEBCC:
-	ldr r0, [sp, 0x8]
-	strb r5, [r0]
-	ldrb r0, [r4, 0x1E]
-	strb r0, [r7]
-	ldrb r0, [r4, 0x1E]
-	cmp r0, 0
-	beq _081DEBE4
-	movs r0, 0xC0
-	b _081DEC06
-	.align 2, 0
-_081DEBE0: .4byte 0x04000090
-_081DEBE4:
-	movs r1, 0x80
-	negs r1, r1
-	strb r1, [r4, 0x1A]
-	b _081DEC08
-_081DEBEC:
-	ldrb r0, [r4, 0x1E]
-	strb r0, [r7]
-	ldr r0, [r4, 0x24]
-	lsls r0, 3
-	ldr r2, [sp, 0x10]
-	strb r0, [r2]
-_081DEBF8:
-	ldrb r0, [r4, 0x4]
-	adds r0, 0x8
-	mov r8, r0
-	ldrb r0, [r4, 0x1E]
-	cmp r0, 0
-	beq _081DEC06
-	movs r0, 0x40
-_081DEC06:
-	strb r0, [r4, 0x1A]
-_081DEC08:
-	ldrb r1, [r4, 0x4]
-	movs r2, 0
-	strb r1, [r4, 0xB]
-	movs r0, 0xFF
-	ands r0, r1
-	adds r1, r6, 0x1
-	mov r10, r1
-	movs r1, 0x40
-	adds r1, r4
-	mov r9, r1
-	cmp r0, 0
-	bne _081DEC22
-	b _081DED5E
-_081DEC22:
-	strb r2, [r4, 0x9]
-	b _081DED8C
-_081DEC26:
-	movs r0, 0x4
-	ands r0, r2
-	cmp r0, 0
-	beq _081DEC58
-	ldrb r0, [r4, 0xD]
-	subs r0, 0x1
-	strb r0, [r4, 0xD]
-	movs r2, 0xFF
-	ands r0, r2
-	lsls r0, 24
-	adds r1, r6, 0x1
-	mov r10, r1
-	movs r2, 0x40
-	adds r2, r4
-	mov r9, r2
-	cmp r0, 0
-	ble _081DEC4A
-	b _081DED9E
-_081DEC4A:
-	lsls r0, r6, 24
-	lsrs r0, 24
-	bl CgbOscOff
-	movs r0, 0
-	strb r0, [r4]
-	b _081DEE9C
-_081DEC58:
-	movs r0, 0x40
-	ands r0, r1
-	adds r2, r6, 0x1
-	mov r10, r2
-	movs r2, 0x40
-	adds r2, r4
-	mov r9, r2
-	cmp r0, 0
-	beq _081DEC98
-	movs r0, 0x3
-	ands r0, r1
-	cmp r0, 0
-	beq _081DEC98
-	movs r0, 0xFC
-	ands r0, r1
-	movs r2, 0
-	strb r0, [r4]
-	ldrb r1, [r4, 0x7]
-	strb r1, [r4, 0xB]
-	movs r0, 0xFF
-	ands r0, r1
-	cmp r0, 0
-	beq _081DECCA
-	movs r0, 0x1
-	ldrb r1, [r4, 0x1D]
-	orrs r0, r1
-	strb r0, [r4, 0x1D]
-	cmp r6, 0x3
-	beq _081DED8C
-	ldrb r2, [r4, 0x7]
-	mov r8, r2
-	b _081DED8C
-_081DEC98:
-	ldrb r0, [r4, 0xB]
-	cmp r0, 0
-	bne _081DED8C
-	cmp r6, 0x3
-	bne _081DECAA
-	movs r0, 0x1
-	ldrb r1, [r4, 0x1D]
-	orrs r0, r1
-	strb r0, [r4, 0x1D]
-_081DECAA:
-	adds r0, r4, 0
-	bl CgbModVol
-	movs r0, 0x3
-	ldrb r2, [r4]
-	ands r0, r2
-	cmp r0, 0
-	bne _081DECFE
-	ldrb r0, [r4, 0x9]
-	subs r0, 0x1
-	strb r0, [r4, 0x9]
-	movs r1, 0xFF
-	ands r0, r1
-	lsls r0, 24
-	cmp r0, 0
-	bgt _081DECFA
-_081DECCA:
-	ldrb r2, [r4, 0xC]
-	ldrb r1, [r4, 0xA]
-	adds r0, r2, 0
-	muls r0, r1
-	adds r0, 0xFF
-	asrs r0, 8
-	movs r1, 0
-	strb r0, [r4, 0x9]
-	lsls r0, 24
-	cmp r0, 0
-	beq _081DEC4A
-	movs r0, 0x4
-	ldrb r2, [r4]
-	orrs r0, r2
-	strb r0, [r4]
-	movs r0, 0x1
-	ldrb r1, [r4, 0x1D]
-	orrs r0, r1
-	strb r0, [r4, 0x1D]
-	cmp r6, 0x3
-	beq _081DED9E
-	movs r2, 0x8
-	mov r8, r2
-	b _081DED9E
-_081DECFA:
-	ldrb r0, [r4, 0x7]
-	b _081DED8A
-_081DECFE:
-	cmp r0, 0x1
-	bne _081DED0A
-_081DED02:
-	ldrb r0, [r4, 0x19]
-	strb r0, [r4, 0x9]
-	movs r0, 0x7
-	b _081DED8A
-_081DED0A:
-	cmp r0, 0x2
-	bne _081DED4E
-	ldrb r0, [r4, 0x9]
-	subs r0, 0x1
-	strb r0, [r4, 0x9]
-	movs r1, 0xFF
-	ands r0, r1
-	lsls r0, 24
-	ldrb r2, [r4, 0x19]
-	lsls r1, r2, 24
-	cmp r0, r1
-	bgt _081DED4A
-_081DED22:
-	ldrb r0, [r4, 0x6]
-	cmp r0, 0
-	bne _081DED32
-	movs r0, 0xFC
-	ldrb r1, [r4]
-	ands r0, r1
-	strb r0, [r4]
-	b _081DECCA
-_081DED32:
-	ldrb r0, [r4]
-	subs r0, 0x1
-	strb r0, [r4]
-	movs r0, 0x1
-	ldrb r2, [r4, 0x1D]
-	orrs r0, r2
-	strb r0, [r4, 0x1D]
-	cmp r6, 0x3
-	beq _081DED02
-	movs r0, 0x8
-	mov r8, r0
-	b _081DED02
-_081DED4A:
-	ldrb r0, [r4, 0x5]
-	b _081DED8A
-_081DED4E:
-	ldrb r0, [r4, 0x9]
-	adds r0, 0x1
-	strb r0, [r4, 0x9]
-	movs r1, 0xFF
-	ands r0, r1
-	ldrb r2, [r4, 0xA]
-	cmp r0, r2
-	bcc _081DED88
-_081DED5E:
-	ldrb r0, [r4]
-	subs r0, 0x1
-	movs r2, 0
-	strb r0, [r4]
-	ldrb r1, [r4, 0x5]
-	strb r1, [r4, 0xB]
-	movs r0, 0xFF
-	ands r0, r1
-	cmp r0, 0
-	beq _081DED22
-	movs r0, 0x1
-	ldrb r1, [r4, 0x1D]
-	orrs r0, r1
-	strb r0, [r4, 0x1D]
-	ldrb r0, [r4, 0xA]
-	strb r0, [r4, 0x9]
-	cmp r6, 0x3
-	beq _081DED8C
-	ldrb r2, [r4, 0x5]
-	mov r8, r2
-	b _081DED8C
-_081DED88:
-	ldrb r0, [r4, 0x4]
-_081DED8A:
-	strb r0, [r4, 0xB]
-_081DED8C:
-	ldrb r0, [r4, 0xB]
-	subs r0, 0x1
-	strb r0, [r4, 0xB]
-	ldr r0, [sp]
-	cmp r0, 0
-	bne _081DED9E
-	subs r0, 0x1
-	str r0, [sp]
-	b _081DEC98
-_081DED9E:
-	movs r0, 0x2
-	ldrb r1, [r4, 0x1D]
-	ands r0, r1
-	cmp r0, 0
-	beq _081DEE16
-	cmp r6, 0x3
-	bgt _081DEDDE
-	movs r0, 0x8
-	ldrb r2, [r4, 0x1]
-	ands r0, r2
-	cmp r0, 0
-	beq _081DEDDE
-	ldr r0, _081DEDC8
-	ldrb r0, [r0]
-	cmp r0, 0x3F
-	bgt _081DEDD0
-	ldr r0, [r4, 0x20]
-	adds r0, 0x2
-	ldr r1, _081DEDCC
-	b _081DEDDA
-	.align 2, 0
-_081DEDC8: .4byte 0x04000089
-_081DEDCC: .4byte 0x000007fc
-_081DEDD0:
-	cmp r0, 0x7F
-	bgt _081DEDDE
-	ldr r0, [r4, 0x20]
-	adds r0, 0x1
-	ldr r1, _081DEDEC
-_081DEDDA:
-	ands r0, r1
-	str r0, [r4, 0x20]
-_081DEDDE:
-	cmp r6, 0x4
-	beq _081DEDF0
-	ldr r0, [r4, 0x20]
-	ldr r1, [sp, 0x10]
-	strb r0, [r1]
-	b _081DEDFE
-	.align 2, 0
-_081DEDEC: .4byte 0x000007fe
-_081DEDF0:
-	ldr r2, [sp, 0x10]
-	ldrb r0, [r2]
-	movs r1, 0x8
-	ands r1, r0
-	ldr r0, [r4, 0x20]
-	orrs r0, r1
-	strb r0, [r2]
-_081DEDFE:
-	movs r0, 0xC0
-	ldrb r1, [r4, 0x1A]
-	ands r0, r1
-	adds r1, r4, 0
-	adds r1, 0x21
-	ldrb r1, [r1]
-	adds r0, r1, r0
-	strb r0, [r4, 0x1A]
-	movs r2, 0xFF
-	ands r0, r2
-	ldr r1, [sp, 0x14]
-	strb r0, [r1]
-_081DEE16:
-	movs r0, 0x1
-	ldrb r2, [r4, 0x1D]
-	ands r0, r2
-	cmp r0, 0
-	beq _081DEE9C
-	ldr r1, _081DEE60
-	ldrb r0, [r1]
-	ldrb r2, [r4, 0x1C]
-	bics r0, r2
-	ldrb r2, [r4, 0x1B]
-	orrs r0, r2
-	strb r0, [r1]
-	cmp r6, 0x3
-	bne _081DEE68
-	ldr r0, _081DEE64
-	ldrb r1, [r4, 0x9]
-	adds r0, r1, r0
-	ldrb r0, [r0]
-	ldr r2, [sp, 0xC]
-	strb r0, [r2]
-	movs r1, 0x80
-	adds r0, r1, 0
-	ldrb r2, [r4, 0x1A]
-	ands r0, r2
-	cmp r0, 0
-	beq _081DEE9C
-	ldr r0, [sp, 0x8]
-	strb r1, [r0]
-	ldrb r0, [r4, 0x1A]
-	ldr r1, [sp, 0x14]
-	strb r0, [r1]
-	movs r0, 0x7F
-	ldrb r2, [r4, 0x1A]
-	ands r0, r2
-	strb r0, [r4, 0x1A]
-	b _081DEE9C
-	.align 2, 0
-_081DEE60: .4byte 0x04000081
-_081DEE64: .4byte gUnknown_0842FBD8
-_081DEE68:
-	movs r0, 0xF
-	mov r1, r8
-	ands r1, r0
-	mov r8, r1
-	ldrb r2, [r4, 0x9]
-	lsls r0, r2, 4
-	add r0, r8
-	ldr r1, [sp, 0xC]
-	strb r0, [r1]
-	movs r2, 0x80
-	ldrb r0, [r4, 0x1A]
-	orrs r0, r2
-	ldr r1, [sp, 0x14]
-	strb r0, [r1]
-	cmp r6, 0x1
-	bne _081DEE9C
-	ldr r0, [sp, 0x8]
-	ldrb r1, [r0]
-	movs r0, 0x8
-	ands r0, r1
-	cmp r0, 0
-	bne _081DEE9C
-	ldrb r0, [r4, 0x1A]
-	orrs r0, r2
-	ldr r1, [sp, 0x14]
-	strb r0, [r1]
-_081DEE9C:
-	movs r0, 0
-	strb r0, [r4, 0x1D]
-_081DEEA0:
-	mov r6, r10
-	mov r4, r9
-	cmp r6, 0x4
-	bgt _081DEEAA
-	b _081DEAA0
-_081DEEAA:
-	add sp, 0x1C
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end CgbSound
-
-	thumb_func_start MPlayTempoControl
-MPlayTempoControl: @ 81DEEBC
-	push {r4,lr}
-	adds r2, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r3, [r2, 0x34]
-	ldr r0, _081DEEE0
-	cmp r3, r0
-	bne _081DEED8
-	strh r1, [r2, 0x1E]
-	ldrh r4, [r2, 0x1C]
-	adds r0, r1, 0
-	muls r0, r4
-	asrs r0, 8
-	strh r0, [r2, 0x20]
-_081DEED8:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DEEE0: .4byte 0x68736d53
-	thumb_func_end MPlayTempoControl
-
-	thumb_func_start MPlayVolumeControl
-MPlayVolumeControl: @ 81DEEE4
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	adds r4, r0, 0
-	lsls r1, 16
-	lsrs r7, r1, 16
-	lsls r6, r2, 16
-	ldr r3, [r4, 0x34]
-	ldr r0, _081DEF48
-	cmp r3, r0
-	bne _081DEF3C
-	adds r0, r3, 0x1
-	str r0, [r4, 0x34]
-	ldrb r2, [r4, 0x8]
-	ldr r1, [r4, 0x2C]
-	movs r5, 0x1
-	cmp r2, 0
-	ble _081DEF38
-	movs r0, 0x80
-	mov r8, r0
-	lsrs r6, 18
-	movs r0, 0x3
-	mov r12, r0
-_081DEF14:
-	adds r0, r7, 0
-	ands r0, r5
-	cmp r0, 0
-	beq _081DEF2E
-	ldrb r3, [r1]
-	mov r0, r8
-	ands r0, r3
-	cmp r0, 0
-	beq _081DEF2E
-	strb r6, [r1, 0x13]
-	mov r0, r12
-	orrs r0, r3
-	strb r0, [r1]
-_081DEF2E:
-	subs r2, 0x1
-	adds r1, 0x50
-	lsls r5, 1
-	cmp r2, 0
-	bgt _081DEF14
-_081DEF38:
-	ldr r0, _081DEF48
-	str r0, [r4, 0x34]
-_081DEF3C:
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DEF48: .4byte 0x68736d53
-	thumb_func_end MPlayVolumeControl
-
-	thumb_func_start MPlayPitchControl
-MPlayPitchControl: @ 81DEF4C
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	adds r4, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	mov r12, r1
-	lsls r2, 16
-	lsrs r6, r2, 16
-	ldr r3, [r4, 0x34]
-	ldr r0, _081DEFBC
-	cmp r3, r0
-	bne _081DEFAE
-	adds r0, r3, 0x1
-	str r0, [r4, 0x34]
-	ldrb r2, [r4, 0x8]
-	ldr r3, [r4, 0x2C]
-	movs r5, 0x1
-	cmp r2, 0
-	ble _081DEFAA
-	movs r0, 0x80
-	mov r9, r0
-	lsls r0, r6, 16
-	asrs r7, r0, 24
-	movs r0, 0xC
-	mov r8, r0
-_081DEF84:
-	mov r0, r12
-	ands r0, r5
-	cmp r0, 0
-	beq _081DEFA0
-	ldrb r1, [r3]
-	mov r0, r9
-	ands r0, r1
-	cmp r0, 0
-	beq _081DEFA0
-	strb r7, [r3, 0xB]
-	strb r6, [r3, 0xD]
-	mov r0, r8
-	orrs r0, r1
-	strb r0, [r3]
-_081DEFA0:
-	subs r2, 0x1
-	adds r3, 0x50
-	lsls r5, 1
-	cmp r2, 0
-	bgt _081DEF84
-_081DEFAA:
-	ldr r0, _081DEFBC
-	str r0, [r4, 0x34]
-_081DEFAE:
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DEFBC: .4byte 0x68736d53
-	thumb_func_end MPlayPitchControl
-
-	thumb_func_start MPlayPanpotControl
-MPlayPanpotControl: @ 81DEFC0
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	adds r4, r0, 0
-	lsls r1, 16
-	lsrs r7, r1, 16
-	lsls r2, 24
-	lsrs r6, r2, 24
-	ldr r3, [r4, 0x34]
-	ldr r0, _081DF024
-	cmp r3, r0
-	bne _081DF018
-	adds r0, r3, 0x1
-	str r0, [r4, 0x34]
-	ldrb r2, [r4, 0x8]
-	ldr r1, [r4, 0x2C]
-	movs r5, 0x1
-	cmp r2, 0
-	ble _081DF014
-	movs r0, 0x80
-	mov r8, r0
-	movs r0, 0x3
-	mov r12, r0
-_081DEFF0:
-	adds r0, r7, 0
-	ands r0, r5
-	cmp r0, 0
-	beq _081DF00A
-	ldrb r3, [r1]
-	mov r0, r8
-	ands r0, r3
-	cmp r0, 0
-	beq _081DF00A
-	strb r6, [r1, 0x15]
-	mov r0, r12
-	orrs r0, r3
-	strb r0, [r1]
-_081DF00A:
-	subs r2, 0x1
-	adds r1, 0x50
-	lsls r5, 1
-	cmp r2, 0
-	bgt _081DEFF0
-_081DF014:
-	ldr r0, _081DF024
-	str r0, [r4, 0x34]
-_081DF018:
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF024: .4byte 0x68736d53
-	thumb_func_end MPlayPanpotControl
-
-	thumb_func_start MP_clear_modM
-MP_clear_modM: @ 81DF028
-	adds r1, r0, 0
-	movs r2, 0
-	movs r0, 0
-	strb r0, [r1, 0x1A]
-	strb r0, [r1, 0x16]
-	ldrb r0, [r1, 0x18]
-	cmp r0, 0
-	bne _081DF03C
-	movs r0, 0xC
-	b _081DF03E
-_081DF03C:
-	movs r0, 0x3
-_081DF03E:
-	ldrb r2, [r1]
-	orrs r0, r2
-	strb r0, [r1]
-	bx lr
-	thumb_func_end MP_clear_modM
-
-	thumb_func_start MPlayModDepthSet
-MPlayModDepthSet: @ 81DF048
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	adds r6, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	mov r10, r1
-	lsls r2, 24
-	lsrs r2, 24
-	mov r8, r2
-	ldr r1, [r6, 0x34]
-	ldr r0, _081DF0B8
-	cmp r1, r0
-	bne _081DF0A8
-	adds r0, r1, 0x1
-	str r0, [r6, 0x34]
-	ldrb r5, [r6, 0x8]
-	ldr r4, [r6, 0x2C]
-	movs r7, 0x1
-	cmp r5, 0
-	ble _081DF0A4
-	mov r9, r8
-_081DF078:
-	mov r0, r10
-	ands r0, r7
-	cmp r0, 0
-	beq _081DF09A
-	movs r0, 0x80
-	ldrb r1, [r4]
-	ands r0, r1
-	cmp r0, 0
-	beq _081DF09A
-	mov r0, r8
-	strb r0, [r4, 0x17]
-	mov r1, r9
-	cmp r1, 0
-	bne _081DF09A
-	adds r0, r4, 0
-	bl MP_clear_modM
-_081DF09A:
-	subs r5, 0x1
-	adds r4, 0x50
-	lsls r7, 1
-	cmp r5, 0
-	bgt _081DF078
-_081DF0A4:
-	ldr r0, _081DF0B8
-	str r0, [r6, 0x34]
-_081DF0A8:
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF0B8: .4byte 0x68736d53
-	thumb_func_end MPlayModDepthSet
-
-	thumb_func_start MPlayLFOSpeedSet
-MPlayLFOSpeedSet: @ 81DF0BC
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	adds r6, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	mov r10, r1
-	lsls r2, 24
-	lsrs r2, 24
-	mov r8, r2
-	ldr r1, [r6, 0x34]
-	ldr r0, _081DF12C
-	cmp r1, r0
-	bne _081DF11C
-	adds r0, r1, 0x1
-	str r0, [r6, 0x34]
-	ldrb r5, [r6, 0x8]
-	ldr r4, [r6, 0x2C]
-	movs r7, 0x1
-	cmp r5, 0
-	ble _081DF118
-	mov r9, r8
-_081DF0EC:
-	mov r0, r10
-	ands r0, r7
-	cmp r0, 0
-	beq _081DF10E
-	movs r0, 0x80
-	ldrb r1, [r4]
-	ands r0, r1
-	cmp r0, 0
-	beq _081DF10E
-	mov r0, r8
-	strb r0, [r4, 0x19]
-	mov r1, r9
-	cmp r1, 0
-	bne _081DF10E
-	adds r0, r4, 0
-	bl MP_clear_modM
-_081DF10E:
-	subs r5, 0x1
-	adds r4, 0x50
-	lsls r7, 1
-	cmp r5, 0
-	bgt _081DF0EC
-_081DF118:
-	ldr r0, _081DF12C
-	str r0, [r6, 0x34]
-_081DF11C:
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF12C: .4byte 0x68736d53
-	thumb_func_end MPlayLFOSpeedSet
-
-	thumb_func_start ply_memacc
-ply_memacc: @ 81DF130
-	push {r4-r6,lr}
-	adds r4, r0, 0
-	adds r6, r1, 0
-	ldr r1, [r6, 0x40]
-	ldrb r5, [r1]
-	adds r2, r1, 0x1
-	str r2, [r6, 0x40]
-	ldr r0, [r4, 0x18]
-	ldrb r1, [r1, 0x1]
-	adds r3, r1, r0
-	adds r0, r2, 0x1
-	str r0, [r6, 0x40]
-	ldrb r2, [r2, 0x1]
-	adds r0, 0x1
-	str r0, [r6, 0x40]
-	cmp r5, 0x11
-	bls _081DF154
-	b _081DF282
-_081DF154:
-	lsls r0, r5, 2
-	ldr r1, _081DF160
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_081DF160: .4byte _081DF164
-	.align 2, 0
-_081DF164:
-	.4byte _081DF1AC
-	.4byte _081DF1B0
-	.4byte _081DF1B8
-	.4byte _081DF1C0
-	.4byte _081DF1CA
-	.4byte _081DF1D8
-	.4byte _081DF1E6
-	.4byte _081DF1EE
-	.4byte _081DF1F6
-	.4byte _081DF1FE
-	.4byte _081DF206
-	.4byte _081DF20E
-	.4byte _081DF216
-	.4byte _081DF224
-	.4byte _081DF232
-	.4byte _081DF240
-	.4byte _081DF24E
-	.4byte _081DF25C
-_081DF1AC:
-	strb r2, [r3]
-	b _081DF282
-_081DF1B0:
-	ldrb r1, [r3]
-	adds r0, r1, r2
-	strb r0, [r3]
-	b _081DF282
-_081DF1B8:
-	ldrb r1, [r3]
-	subs r0, r1, r2
-	strb r0, [r3]
-	b _081DF282
-_081DF1C0:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r0, [r0]
-	strb r0, [r3]
-	b _081DF282
-_081DF1CA:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r1, [r3]
-	ldrb r0, [r0]
-	adds r0, r1, r0
-	strb r0, [r3]
-	b _081DF282
-_081DF1D8:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r1, [r3]
-	ldrb r0, [r0]
-	subs r0, r1, r0
-	strb r0, [r3]
-	b _081DF282
-_081DF1E6:
-	ldrb r3, [r3]
-	cmp r3, r2
-	beq _081DF268
-	b _081DF27C
-_081DF1EE:
-	ldrb r3, [r3]
-	cmp r3, r2
-	bne _081DF268
-	b _081DF27C
-_081DF1F6:
-	ldrb r3, [r3]
-	cmp r3, r2
-	bhi _081DF268
-	b _081DF27C
-_081DF1FE:
-	ldrb r3, [r3]
-	cmp r3, r2
-	bcs _081DF268
-	b _081DF27C
-_081DF206:
-	ldrb r3, [r3]
-	cmp r3, r2
-	bls _081DF268
-	b _081DF27C
-_081DF20E:
-	ldrb r3, [r3]
-	cmp r3, r2
-	bcc _081DF268
-	b _081DF27C
-_081DF216:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r3, [r3]
-	ldrb r0, [r0]
-	cmp r3, r0
-	beq _081DF268
-	b _081DF27C
-_081DF224:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r3, [r3]
-	ldrb r0, [r0]
-	cmp r3, r0
-	bne _081DF268
-	b _081DF27C
-_081DF232:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r3, [r3]
-	ldrb r0, [r0]
-	cmp r3, r0
-	bhi _081DF268
-	b _081DF27C
-_081DF240:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r3, [r3]
-	ldrb r0, [r0]
-	cmp r3, r0
-	bcs _081DF268
-	b _081DF27C
-_081DF24E:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r3, [r3]
-	ldrb r0, [r0]
-	cmp r3, r0
-	bls _081DF268
-	b _081DF27C
-_081DF25C:
-	ldr r0, [r4, 0x18]
-	adds r0, r2
-	ldrb r3, [r3]
-	ldrb r0, [r0]
-	cmp r3, r0
-	bcs _081DF27C
-_081DF268:
-	ldr r0, _081DF278
-	ldr r2, [r0]
-	adds r0, r4, 0
-	adds r1, r6, 0
-	bl _call_via_r2
-	b _081DF282
-	.align 2, 0
-_081DF278: .4byte 0x03007074
-_081DF27C:
-	ldr r0, [r6, 0x40]
-	adds r0, 0x4
-	str r0, [r6, 0x40]
-_081DF282:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end ply_memacc
-
-	thumb_func_start ply_xcmd
-ply_xcmd: @ 81DF288
-	push {lr}
-	ldr r2, [r1, 0x40]
-	ldrb r3, [r2]
-	adds r2, 0x1
-	str r2, [r1, 0x40]
-	ldr r2, _081DF2A4
-	lsls r3, 2
-	adds r3, r2
-	ldr r2, [r3]
-	bl _call_via_r2
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF2A4: .4byte gUnknown_0842FC50
-	thumb_func_end ply_xcmd
-
-	thumb_func_start ply_xxx
-ply_xxx: @ 81DF2A8
-	push {lr}
-	ldr r2, _081DF2B8
-	ldr r2, [r2]
-	bl _call_via_r2
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF2B8: .4byte 0x03007070
-	thumb_func_end ply_xxx
-
-	thumb_func_start ply_xwave
-ply_xwave: @ 81DF2BC
-	push {r4,lr}
-	ldr r2, [r1, 0x40]
-	ldr r0, _081DF2F4
-	ands r4, r0
-	ldrb r0, [r2]
-	orrs r4, r0
-	ldrb r0, [r2, 0x1]
-	lsls r3, r0, 8
-	ldr r0, _081DF2F8
-	ands r4, r0
-	orrs r4, r3
-	ldrb r0, [r2, 0x2]
-	lsls r3, r0, 16
-	ldr r0, _081DF2FC
-	ands r4, r0
-	orrs r4, r3
-	ldrb r0, [r2, 0x3]
-	lsls r3, r0, 24
-	ldr r0, _081DF300
-	ands r4, r0
-	orrs r4, r3
-	str r4, [r1, 0x28]
-	adds r2, 0x4
-	str r2, [r1, 0x40]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF2F4: .4byte 0xffffff00
-_081DF2F8: .4byte 0xffff00ff
-_081DF2FC: .4byte 0xff00ffff
-_081DF300: .4byte 0x00ffffff
-	thumb_func_end ply_xwave
-
-	thumb_func_start ply_xtype
-ply_xtype: @ 81DF304
-	ldr r0, [r1, 0x40]
-	ldrb r2, [r0]
-	adds r0, r1, 0
-	adds r0, 0x24
-	strb r2, [r0]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xtype
-
-	thumb_func_start ply_xatta
-ply_xatta: @ 81DF318
-	ldr r0, [r1, 0x40]
-	ldrb r2, [r0]
-	adds r0, r1, 0
-	adds r0, 0x2C
-	strb r2, [r0]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xatta
-
-	thumb_func_start ply_xdeca
-ply_xdeca: @ 81DF32C
-	ldr r0, [r1, 0x40]
-	ldrb r0, [r0]
-	adds r2, r1, 0
-	adds r2, 0x2D
-	strb r0, [r2]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xdeca
-
-	thumb_func_start ply_xsust
-ply_xsust: @ 81DF340
-	ldr r0, [r1, 0x40]
-	ldrb r0, [r0]
-	adds r2, r1, 0
-	adds r2, 0x2E
-	strb r0, [r2]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xsust
-
-	thumb_func_start ply_xrele
-ply_xrele: @ 81DF354
-	ldr r0, [r1, 0x40]
-	ldrb r0, [r0]
-	adds r2, r1, 0
-	adds r2, 0x2F
-	strb r0, [r2]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xrele
-
-	thumb_func_start ply_xiecv
-ply_xiecv: @ 81DF368
-	ldr r0, [r1, 0x40]
-	ldrb r2, [r0]
-	strb r2, [r1, 0x1E]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xiecv
-
-	thumb_func_start ply_xiecl
-ply_xiecl: @ 81DF374
-	ldr r0, [r1, 0x40]
-	ldrb r2, [r0]
-	strb r2, [r1, 0x1F]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xiecl
-
-	thumb_func_start ply_xleng
-ply_xleng: @ 81DF380
-	ldr r0, [r1, 0x40]
-	ldrb r0, [r0]
-	adds r2, r1, 0
-	adds r2, 0x26
-	strb r0, [r2]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xleng
-
-	thumb_func_start ply_xswee
-ply_xswee: @ 81DF394
-	ldr r0, [r1, 0x40]
-	ldrb r0, [r0]
-	adds r2, r1, 0
-	adds r2, 0x27
-	strb r0, [r2]
-	ldr r0, [r1, 0x40]
-	adds r0, 0x1
-	str r0, [r1, 0x40]
-	bx lr
-	thumb_func_end ply_xswee
-
-	thumb_func_start ply_xcmd0C
-ply_xcmd0C: @ 81DF3A8
-	push {r4,lr}
-	adds r3, r1, 0
-	ldr r4, [r3, 0x40]
-	ldr r0, _081DF3D8
-	ands r2, r0
-	ldrb r0, [r4]
-	orrs r2, r0
-	ldrb r0, [r4, 0x1]
-	lsls r1, r0, 8
-	ldr r0, _081DF3DC
-	ands r2, r0
-	orrs r2, r1
-	ldrh r1, [r3, 0x3A]
-	lsls r0, r2, 16
-	lsrs r0, 16
-	cmp r1, r0
-	bcs _081DF3E0
-	adds r0, r1, 0x1
-	strh r0, [r3, 0x3A]
-	subs r0, r4, 0x2
-	str r0, [r3, 0x40]
-	movs r0, 0x1
-	strb r0, [r3, 0x1]
-	b _081DF3E8
-	.align 2, 0
-_081DF3D8: .4byte 0xffffff00
-_081DF3DC: .4byte 0xffff00ff
-_081DF3E0:
-	movs r0, 0
-	strh r0, [r3, 0x3A]
-	adds r0, r4, 0x2
-	str r0, [r3, 0x40]
-_081DF3E8:
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end ply_xcmd0C
-
-	thumb_func_start ply_xcmd0D
-ply_xcmd0D: @ 81DF3F0
-	push {r4,lr}
-	ldr r2, [r1, 0x40]
-	ldr r0, _081DF428
-	ands r4, r0
-	ldrb r0, [r2]
-	orrs r4, r0
-	ldrb r0, [r2, 0x1]
-	lsls r3, r0, 8
-	ldr r0, _081DF42C
-	ands r4, r0
-	orrs r4, r3
-	ldrb r0, [r2, 0x2]
-	lsls r3, r0, 16
-	ldr r0, _081DF430
-	ands r4, r0
-	orrs r4, r3
-	ldrb r0, [r2, 0x3]
-	lsls r3, r0, 24
-	ldr r0, _081DF434
-	ands r4, r0
-	orrs r4, r3
-	str r4, [r1, 0x3C]
-	adds r2, 0x4
-	str r2, [r1, 0x40]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF428: .4byte 0xffffff00
-_081DF42C: .4byte 0xffff00ff
-_081DF430: .4byte 0xff00ffff
-_081DF434: .4byte 0x00ffffff
-	thumb_func_end ply_xcmd0D
-
-	thumb_func_start DummyFunc_rev
-DummyFunc_rev: @ 81DF438
-	bx lr
-	thumb_func_end DummyFunc_rev
-
-	thumb_func_start sub_81DF43C
-sub_81DF43C: @ 81DF43C
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	mov r9, r0
-	movs r6, 0
-	movs r1, 0
-	movs r4, 0
-	ldr r0, _081DF4F8
-	mov r8, r0
-	ldr r7, _081DF4FC
-	ldr r0, _081DF500
-	mov r10, r0
-	mov r5, r8
-	adds r5, 0xC
-	movs r3, 0
-	ldr r0, _081DF504
-	mov r12, r0
-_081DF462:
-	mov r0, r12
-	adds r2, r3, r0
-	ldrb r0, [r2]
-	cmp r0, 0
-	bne _081DF478
-	ldr r0, [r2, 0x20]
-	cmp r0, 0
-	beq _081DF48E
-	ldr r0, [r0, 0x2C]
-	cmp r0, r2
-	bne _081DF48E
-_081DF478:
-	ldr r0, [r5]
-	cmp r6, r0
-	bcs _081DF482
-	adds r6, r0, 0
-	adds r1, r4, 0
-_081DF482:
-	adds r5, 0x40
-	adds r3, 0xA0
-	adds r4, 0x1
-	cmp r4, 0x1
-	ble _081DF462
-	adds r4, r1, 0
-_081DF48E:
-	lsls r5, r4, 6
-	add r5, r8
-	ldr r0, [r5, 0x34]
-	adds r0, 0x1
-	str r0, [r5, 0x34]
-	movs r0, 0x34
-	muls r4, r0
-	adds r6, r4, r7
-	adds r0, r6, 0
-	mov r1, r10
-	movs r2, 0x34
-	bl memcpy
-	adds r0, r7, 0x4
-	adds r0, r4, r0
-	mov r1, r9
-	str r1, [r0]
-	adds r1, r7, 0
-	adds r1, 0x8
-	adds r1, r4, r1
-	adds r0, r7, 0
-	adds r0, 0x11
-	adds r0, r4, r0
-	str r0, [r1]
-	adds r1, r7, 0
-	adds r1, 0xC
-	adds r1, r4, r1
-	adds r0, r7, 0
-	adds r0, 0x18
-	adds r0, r4, r0
-	str r0, [r1]
-	adds r0, r7, 0
-	adds r0, 0x14
-	adds r0, r4, r0
-	adds r1, r7, 0
-	adds r1, 0x1A
-	adds r4, r1
-	str r4, [r0]
-	ldr r0, _081DF508
-	str r0, [r5, 0x34]
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl MPlayStart_rev01
-	adds r0, r5, 0
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_081DF4F8: .4byte 0x03006ff0
-_081DF4FC: .4byte 0x03006f80
-_081DF500: .4byte 0x03007340
-_081DF504: .4byte 0x03007200
-_081DF508: .4byte 0x68736d53
-	thumb_func_end sub_81DF43C
-
-	thumb_func_start sub_81DF50C
-sub_81DF50C: @ 81DF50C
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _081DF51C
-	movs r1, 0x7F
-	ands r0, r1
-	strb r0, [r2, 0x1D]
-	bx lr
-	.align 2, 0
-_081DF51C: .4byte 0x03007340
-	thumb_func_end sub_81DF50C
-
-	thumb_func_start sub_81DF520
-sub_81DF520: @ 81DF520
-	ldr r2, _081DF534
-	lsls r0, 24
-	asrs r0, 24
-	adds r0, 0x40
-	movs r1, 0x7F
-	ands r0, r1
-	adds r2, 0x28
-	strb r0, [r2]
-	bx lr
-	.align 2, 0
-_081DF534: .4byte 0x03007340
-	thumb_func_end sub_81DF520
-
-	thumb_func_start sub_81DF538
-sub_81DF538: @ 81DF538
-	push {r4-r6,lr}
-	lsls r0, 16
-	ldr r3, _081DF56C
-	ldrb r2, [r3, 0x19]
-	ldrb r4, [r3, 0x12]
-	subs r1, r2, r4
-	lsls r1, 24
-	lsrs r1, 24
-	movs r6, 0x80
-	lsls r6, 16
-	adds r0, r6
-	asrs r2, r0, 24
-	movs r5, 0x7F
-	movs r4, 0x7F
-	ands r2, r4
-	movs r6, 0x2A
-	strb r2, [r6, r3]
-	asrs r0, 17
-	ands r0, r4
-	strb r0, [r3, 0x12]
-	adds r1, r0
-	ands r1, r5
-	strb r1, [r3, 0x19]
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081DF56C: .4byte 0x03007340
-	thumb_func_end sub_81DF538
-
-	thumb_func_start sub_81DF570
-sub_81DF570: @ 81DF570
-	ldr r1, _081DF578
-	strh r0, [r1, 0x2E]
-	bx lr
-	.align 2, 0
-_081DF578: .4byte 0x03007340
-	thumb_func_end sub_81DF570
-
-	thumb_func_start sub_81DF57C
-sub_81DF57C: @ 81DF57C
-	ldr r1, _081DF584
-	adds r1, 0x26
-	strb r0, [r1]
-	bx lr
-	.align 2, 0
-_081DF584: .4byte 0x03007340
-	thumb_func_end sub_81DF57C
-
-	thumb_func_start sub_81DF588
-sub_81DF588: @ 81DF588
-	ldr r1, _081DF590
-	str r0, [r1, 0x20]
-	bx lr
-	.align 2, 0
-_081DF590: .4byte 0x03007340
-	thumb_func_end sub_81DF588
-
-	thumb_func_start sub_81DF594
-sub_81DF594: @ 81DF594
-	ldr r1, [r0, 0x2C]
-	ldr r0, [r1, 0x20]
-	cmp r0, 0
-	beq _081DF5A6
-	ldr r0, [r0, 0x2C]
-	cmp r0, r1
-	bne _081DF5A6
-	movs r0, 0x1
-	b _081DF5A8
-_081DF5A6:
-	movs r0, 0
-_081DF5A8:
-	bx lr
-	thumb_func_end sub_81DF594
-
-	thumb_func_start sub_81DF5AC
-sub_81DF5AC: @ 81DF5AC
-	lsls r0, 24
-	lsrs r1, r0, 24
-	cmp r0, 0
-	beq _081DF5CC
-	ldr r2, _081DF5C8
-	movs r0, 0x2
-	strb r0, [r2]
-	ldrb r3, [r2, 0x12]
-	adds r0, r3, r1
-	movs r1, 0x7F
-	ands r0, r1
-	strb r0, [r2, 0x19]
-	b _081DF5D2
-	.align 2, 0
-_081DF5C8: .4byte 0x03007340
-_081DF5CC:
-	ldr r1, _081DF5D4
-	movs r0, 0x1
-	strb r0, [r1]
-_081DF5D2:
-	bx lr
-	.align 2, 0
-_081DF5D4: .4byte 0x03007340
-	thumb_func_end sub_81DF5AC
-
-	thumb_func_start sub_81DF5D8
-sub_81DF5D8: @ 81DF5D8
-	ldr r1, _081DF5F0
-	ldr r2, [r1]
-	cmp r0, 0
-	beq _081DF5FC
-	ldr r1, _081DF5F4
-	ldr r3, _081DF5F8
-	adds r0, r3, 0
-	strh r0, [r1]
-	movs r0, 0xFE
-	ldrb r1, [r2, 0x9]
-	ands r0, r1
-	b _081DF60A
-	.align 2, 0
-_081DF5F0: .4byte 0x03007ff0
-_081DF5F4: .4byte 0x04000082
-_081DF5F8: .4byte 0x0000210e
-_081DF5FC:
-	ldr r1, _081DF610
-	ldr r3, _081DF614
-	adds r0, r3, 0
-	strh r0, [r1]
-	movs r0, 0x1
-	ldrb r1, [r2, 0x9]
-	orrs r0, r1
-_081DF60A:
-	strb r0, [r2, 0x9]
-	bx lr
-	.align 2, 0
-_081DF610: .4byte 0x04000082
-_081DF614: .4byte 0x00003302
-	thumb_func_end sub_81DF5D8
-
-	thumb_func_start sub_81DF618
-sub_81DF618: @ 81DF618
-	ldr r1, _081DF620
-	strb r0, [r1, 0x2]
-	bx lr
-	.align 2, 0
-_081DF620: .4byte 0x03007340
-	thumb_func_end sub_81DF618
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/asm/m4a_1.s b/asm/m4a_1.s
new file mode 100644
index 000000000..3f079d0ec
--- /dev/null
+++ b/asm/m4a_1.s
@@ -0,0 +1,1908 @@
+	.include "asm/macros.s"
+	.include "constants/gba_constants.s"
+	.include "constants/m4a_constants.s"
+
+	.syntax unified
+
+	.text
+
+	thumb_func_start umul3232H32
+umul3232H32:
+	adr r2, __umul3232H32
+	bx r2
+	.arm
+__umul3232H32:
+	umull r2, r3, r0, r1
+	add r0, r3, 0
+	bx lr
+	thumb_func_end umul3232H32
+
+	thumb_func_start SoundMain
+SoundMain:
+	ldr r0, lt_SOUND_INFO_PTR
+	ldr r0, [r0]
+	ldr r2, lt_ID_NUMBER
+	ldr r3, [r0, o_SoundInfo_ident]
+	cmp r2, r3
+	beq SoundMain_1
+	bx lr @ Exit the function if ident doesn't match ID_NUMBER.
+SoundMain_1:
+	adds r3, 1
+	str r3, [r0, o_SoundInfo_ident]
+	push {r4-r7,lr}
+	mov r1, r8
+	mov r2, r9
+	mov r3, r10
+	mov r4, r11
+	push {r0-r4}
+	sub sp, 0x18
+	ldrb r1, [r0, o_SoundInfo_maxLines]
+	cmp r1, 0 @ if maxLines is 0, there is no maximum
+	beq SoundMain_3
+	ldr r2, lt_REG_VCOUNT
+	ldrb r2, [r2]
+	cmp r2, VCOUNT_VBLANK
+	bhs SoundMain_2
+	adds r2, TOTAL_SCANLINES
+SoundMain_2:
+	adds r1, r2
+SoundMain_3:
+	str r1, [sp, 0x14]
+	ldr r3, [r0, o_SoundInfo_func]
+	cmp r3, 0
+	beq SoundMain_4
+	ldr r0, [r0, o_SoundInfo_intp]
+	bl _081DD25E
+	ldr r0, [sp, 0x18]
+SoundMain_4:
+	ldr r3, [r0, o_SoundInfo_CgbSound]
+	bl _081DD25E
+	ldr r0, [sp, 0x18]
+	ldr r3, [r0, o_SoundInfo_pcmSamplesPerVBlank]
+	mov r8, r3
+	ldr r5, lt_o_SoundInfo_pcmBuffer
+	adds r5, r0
+	ldrb r4, [r0, o_SoundInfo_pcmDmaCounter]
+	subs r7, r4, 1
+	bls SoundMain_5
+	ldrb r1, [r0, o_SoundInfo_pcmDmaPeriod]
+	subs r1, r7
+	mov r2, r8
+	muls r2, r1
+	adds r5, r2
+SoundMain_5:
+	str r5, [sp, 0x8]
+	ldr r6, lt_PCM_DMA_BUF_SIZE
+	ldr r3, lt_SoundMainRAM_Buffer
+	bx r3
+
+	.align 2, 0
+lt_SOUND_INFO_PTR:        .word SOUND_INFO_PTR
+lt_ID_NUMBER:             .word ID_NUMBER
+lt_SoundMainRAM_Buffer:   .word SoundMainRAM_Buffer + 1
+lt_REG_VCOUNT:            .word REG_VCOUNT
+lt_o_SoundInfo_pcmBuffer: .word o_SoundInfo_pcmBuffer
+lt_PCM_DMA_BUF_SIZE:      .word PCM_DMA_BUF_SIZE
+	thumb_func_end SoundMain
+
+	thumb_func_start SoundMainRAM
+SoundMainRAM:
+	ldrb r3, [r0, o_SoundInfo_reverb]
+	cmp r3, 0
+	beq SoundMainRAM_NoReverb
+	adr r1, SoundMainRAM_Reverb
+	bx r1
+	.arm
+SoundMainRAM_Reverb:
+	cmp r4, 0x2
+	addeq r7, r0, o_SoundInfo_pcmBuffer
+	addne r7, r5, r8
+	mov r4, r8
+_081DCEC4:
+	ldrsb r0, [r5, r6]
+	ldrsb r1, [r5]
+	add r0, r0, r1
+	ldrsb r1, [r7, r6]
+	add r0, r0, r1
+	ldrsb r1, [r7], 0x1
+	add r0, r0, r1
+	mul r1, r0, r3
+	mov r0, r1, asr 9
+	tst r0, 0x80
+	addne r0, r0, 0x1
+	strb r0, [r5, r6]
+	strb r0, [r5], 0x1
+	subs r4, r4, 0x1
+	bgt _081DCEC4
+	adr r0, _081DCF36 + 1 @ plus 1 because THUMB
+	bx r0
+	.thumb
+SoundMainRAM_NoReverb:
+	movs r0, 0
+	mov r1, r8
+	adds r6, r5
+	lsrs r1, 3
+	bcc SoundMainRAM_NoReverb_Ok
+	stm r5!, {r0}
+	stm r6!, {r0}
+SoundMainRAM_NoReverb_Ok:
+	lsrs r1, 1
+	bcc SoundMainRAM_NoReverb_Loop
+	stm r5!, {r0}
+	stm r6!, {r0}
+	stm r5!, {r0}
+	stm r6!, {r0}
+SoundMainRAM_NoReverb_Loop:
+	stm r5!, {r0}
+	stm r6!, {r0}
+	stm r5!, {r0}
+	stm r6!, {r0}
+	stm r5!, {r0}
+	stm r6!, {r0}
+	stm r5!, {r0}
+	stm r6!, {r0}
+	subs r1, 1
+	bgt SoundMainRAM_NoReverb_Loop
+_081DCF36:
+	ldr r4, [sp, 0x18]
+	ldr r0, [r4, o_SoundInfo_divFreq]
+	mov r12, r0
+	ldrb r0, [r4, o_SoundInfo_maxChans]
+	adds r4, o_SoundInfo_chans
+
+SoundMainRAM_ChanLoop:
+	str r0, [sp, 0x4]
+	ldr r3, [r4, o_SoundChannel_wav]
+	ldr r0, [sp, 0x14]
+	cmp r0, 0
+	beq _081DCF60
+	ldr r1, =REG_VCOUNT
+	ldrb r1, [r1]
+	cmp r1, VCOUNT_VBLANK
+	bhs _081DCF54
+	adds r1, TOTAL_SCANLINES
+_081DCF54:
+	cmp r1, r0
+	blo _081DCF60
+	b _081DD24A
+
+	.pool
+
+_081DCF60:
+	ldrb r6, [r4, o_SoundChannel_status]
+	movs r0, 0xC7
+	tst r0, r6
+	bne _081DCF6A
+	b _081DD240
+_081DCF6A:
+	movs r0, 0x80
+	tst r0, r6
+	beq _081DCFA0
+	movs r0, 0x40
+	tst r0, r6
+	bne _081DCFB0
+	movs r6, 0x3
+	strb r6, [r4, o_SoundChannel_status]
+	adds r0, r3, 0
+	adds r0, 0x10
+	ldr r1, [r4, o_SoundChannel_ct]
+	adds r0, r1
+	str r0, [r4, o_SoundChannel_cp]
+	ldr r0, [r3, 0xC]
+	subs r0, r1
+	str r0, [r4, o_SoundChannel_ct]
+	movs r5, 0
+	strb r5, [r4, o_SoundChannel_ev]
+	str r5, [r4, o_SoundChannel_fw]
+	ldrb r2, [r3, 0x3]
+	movs r0, 0xC0
+	tst r0, r2
+	beq _081DCFF8
+	movs r0, 0x10
+	orrs r6, r0
+	strb r6, [r4, o_SoundChannel_status]
+	b _081DCFF8
+_081DCFA0:
+	ldrb r5, [r4, o_SoundChannel_ev]
+	movs r0, 0x4
+	tst r0, r6
+	beq _081DCFB6
+	ldrb r0, [r4, o_SoundChannel_iel]
+	subs r0, 1
+	strb r0, [r4, o_SoundChannel_iel]
+	bhi _081DD006
+_081DCFB0:
+	movs r0, 0
+	strb r0, [r4, o_SoundChannel_status]
+	b _081DD240
+_081DCFB6:
+	movs r0, 0x40
+	tst r0, r6
+	beq _081DCFD6
+	ldrb r0, [r4, o_SoundChannel_release]
+	muls r5, r0
+	lsrs r5, 8
+	ldrb r0, [r4, o_SoundChannel_iev]
+	cmp r5, r0
+	bhi _081DD006
+_081DCFC8:
+	ldrb r5, [r4, o_SoundChannel_iev]
+	cmp r5, 0
+	beq _081DCFB0
+	movs r0, 0x4
+	orrs r6, r0
+	strb r6, [r4, o_SoundChannel_status]
+	b _081DD006
+_081DCFD6:
+	movs r2, 0x3
+	ands r2, r6
+	cmp r2, 0x2
+	bne _081DCFF4
+	ldrb r0, [r4, o_SoundChannel_decay]
+	muls r5, r0
+	lsrs r5, 8
+	ldrb r0, [r4, o_SoundChannel_sustain]
+	cmp r5, r0
+	bhi _081DD006
+	adds r5, r0, 0
+	beq _081DCFC8
+	subs r6, 0x1
+	strb r6, [r4, o_SoundChannel_status]
+	b _081DD006
+_081DCFF4:
+	cmp r2, 0x3
+	bne _081DD006
+_081DCFF8:
+	ldrb r0, [r4, o_SoundChannel_attack]
+	adds r5, r0
+	cmp r5, 0xFF
+	bcc _081DD006
+	movs r5, 0xFF
+	subs r6, 0x1
+	strb r6, [r4, o_SoundChannel_status]
+_081DD006:
+	strb r5, [r4, o_SoundChannel_ev]
+	ldr r0, [sp, 0x18]
+	ldrb r0, [r0, o_SoundChannel_release]
+	adds r0, 0x1
+	muls r0, r5
+	lsrs r5, r0, 4
+	ldrb r0, [r4, o_SoundChannel_rightVolume]
+	muls r0, r5
+	lsrs r0, 8
+	strb r0, [r4, o_SoundChannel_er]
+	ldrb r0, [r4, o_SoundChannel_leftVolume]
+	muls r0, r5
+	lsrs r0, 8
+	strb r0, [r4, o_SoundChannel_el]
+	movs r0, 0x10
+	ands r0, r6
+	str r0, [sp, 0x10]
+	beq _081DD03A
+	adds r0, r3, 0
+	adds r0, 0x10
+	ldr r1, [r3, 0x8]
+	adds r0, r1
+	str r0, [sp, 0xC]
+	ldr r0, [r3, 0xC]
+	subs r0, r1
+	str r0, [sp, 0x10]
+_081DD03A:
+	ldr r5, [sp, 0x8]
+	ldr r2, [r4, o_SoundChannel_ct]
+	ldr r3, [r4, o_SoundChannel_cp]
+	adr r0, _081DD044
+	bx r0
+	.arm
+_081DD044:
+	str r8, [sp]
+	ldr r9, [r4, o_SoundChannel_fw]
+	ldrb r10, [r4, o_SoundChannel_er]
+	ldrb r11, [r4, o_SoundChannel_el]
+	ldrb r0, [r4, o_SoundChannel_type]
+	tst r0, 0x30
+	beq _081DD068
+	bl sub_81DD264
+	b _081DD228
+_081DD068:
+	mov r10, r10, lsl 16
+	mov r11, r11, lsl 16
+	ldrb r0, [r4, o_SoundChannel_type]
+	tst r0, 0x8
+	beq _081DD19C
+_081DD07C:
+	cmp r2, 0x4
+	ble _081DD0EC
+	subs r2, r2, r8
+	movgt r9, 0
+	bgt _081DD0A8
+	mov r9, r8
+	add r2, r2, r8
+	sub r8, r2, 0x4
+	sub r9, r9, r8
+	ands r2, r2, 0x3
+	moveq r2, 0x4
+_081DD0A8:
+	ldr r6, [r5]
+	ldr r7, [r5, 0x630]
+_081DD0B0:
+	ldrsb r0, [r3], 0x1
+	mul r1, r10, r0
+	bic r1, r1, 0xFF0000
+	add r6, r1, r6, ror 8
+	mul r1, r11, r0
+	bic r1, r1, 0xFF0000
+	add r7, r1, r7, ror 8
+	adds r5, r5, 0x40000000
+	bcc _081DD0B0
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	subs r8, r8, 0x4
+	bgt _081DD0A8
+	adds r8, r8, r9
+	beq _081DD22C
+_081DD0EC:
+	ldr r6, [r5]
+	ldr r7, [r5, 0x630]
+_081DD0F4:
+	ldrsb r0, [r3], 0x1
+	mul r1, r10, r0
+	bic r1, r1, 0xFF0000
+	add r6, r1, r6, ror 8
+	mul r1, r11, r0
+	bic r1, r1, 0xFF0000
+	add r7, r1, r7, ror 8
+	subs r2, r2, 0x1
+	beq _081DD164
+_081DD118:
+	adds r5, r5, 0x40000000
+	bcc _081DD0F4
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	subs r8, r8, 0x4
+	bgt _081DD07C
+	b _081DD22C
+_081DD134:
+	ldr r0, [sp, 0x18]
+	cmp r0, 0
+	beq _081DD158
+	ldr r3, [sp, 0x14]
+	rsb lr, r2, 0
+_081DD148:
+	adds r2, r0, r2
+	bgt _081DD1FC
+	sub lr, lr, r0
+	b _081DD148
+_081DD158:
+	pop {r4,r12}
+	mov r2, 0
+	b _081DD174
+_081DD164:
+	ldr r2, [sp, 0x10]
+	cmp r2, 0
+	ldrne r3, [sp, 0xC]
+	bne _081DD118
+_081DD174:
+	strb r2, [r4, o_SoundChannel_status]
+	mov r0, r5, lsr 30
+	bic r5, r5, 0xC0000000
+	rsb r0, r0, 0x3
+	mov r0, r0, lsl 3
+	mov r6, r6, ror r0
+	mov r7, r7, ror r0
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	b _081DD234
+_081DD19C:
+	push {r4,r12}
+	ldr r1, [r4, o_SoundChannel_freq]
+	mul r4, r12, r1
+	ldrsb r0, [r3]
+	ldrsb r1, [r3, 0x1]!
+	sub r1, r1, r0
+_081DD1B4:
+	ldr r6, [r5]
+	ldr r7, [r5, 0x630]
+_081DD1BC:
+	mul lr, r9, r1
+	add lr, r0, lr, asr 23
+	mul r12, r10, lr
+	bic r12, r12, 0xFF0000
+	add r6, r12, r6, ror 8
+	mul r12, r11, lr
+	bic r12, r12, 0xFF0000
+	add r7, r12, r7, ror 8
+	add r9, r9, r4
+	movs lr, r9, lsr 23
+	beq _081DD208
+	bic r9, r9, 0x3F800000
+	subs r2, r2, lr
+	ble _081DD134
+	subs lr, lr, 0x1
+	addeq r0, r0, r1
+_081DD1FC:
+	ldrsbne r0, [r3, lr]!
+	ldrsb r1, [r3, 0x1]!
+	sub r1, r1, r0
+_081DD208:
+	adds r5, r5, 0x40000000
+	bcc _081DD1BC
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	subs r8, r8, 0x4
+	bgt _081DD1B4
+	sub r3, r3, 0x1
+	pop {r4,r12}
+_081DD228:
+	str r9, [r4, o_SoundChannel_fw]
+_081DD22C:
+	str r2, [r4, o_SoundChannel_ct]
+	str r3, [r4, o_SoundChannel_cp]
+_081DD234:
+	ldr r8, [sp]
+	add r0, pc, 0x1
+	bx r0
+	.thumb
+_081DD240:
+	ldr r0, [sp, 0x4]
+	subs r0, 1
+	ble _081DD24A
+	adds r4, SoundChannel_size
+	b SoundMainRAM_ChanLoop
+_081DD24A:
+	ldr r0, [sp, 0x18]
+	ldr r3, =ID_NUMBER
+	str r3, [r0]
+	add sp, 0x1C
+	pop {r0-r7}
+	mov r8, r0
+	mov r9, r1
+	mov r10, r2
+	mov r11, r3
+	pop {r3}
+_081DD25E:
+	bx r3
+	.pool
+	thumb_func_end SoundMainRAM
+
+	arm_func_start sub_81DD264
+sub_81DD264:
+	ldr r6, [r4, o_SoundChannel_wav]
+	ldrb r0, [r4, o_SoundChannel_status]
+	tst r0, 0x20
+	bne _081DD2B4
+	orr r0, r0, 0x20
+	strb r0, [r4, o_SoundChannel_status]
+	ldrb r0, [r4, o_SoundChannel_type]
+	tst r0, 0x10
+	beq _081DD29C
+	ldr r1, [r6, 0xC]
+	add r1, r1, r6, lsl 1
+	add r1, r1, 0x20
+	sub r3, r1, r3
+	str r3, [r4, o_SoundChannel_cp]
+_081DD29C:
+	ldrh r0, [r6]
+	cmp r0, 0
+	beq _081DD2B4
+	sub r3, r3, r6
+	sub r3, r3, 0x10
+	str r3, [r4, o_SoundChannel_cp]
+_081DD2B4:
+	push {r8,r12,lr}
+	mov r10, r10, lsl 16
+	mov r11, r11, lsl 16
+	ldr r1, [r4, o_SoundChannel_freq]
+	ldrb r0, [r4, o_SoundChannel_type]
+	tst r0, 0x8
+	movne r8, 0x800000
+	muleq r8, r12, r1
+	ldrh r0, [r6]
+	cmp r0, 0
+	beq _081DD468
+	mov r0, 0xFF000000
+	str r0, [r4, o_SoundChannel_xpi]
+	ldrb r0, [r4, o_SoundChannel_type]
+	tst r0, 0x10
+	bne _081DD3C0
+	bl sub_81DD520
+	mov r0, r1
+	add r3, r3, 0x1
+	bl sub_81DD520
+	sub r1, r1, r0
+_081DD308:
+	ldr r6, [r5]
+	ldr r7, [r5, 0x630]
+_081DD310:
+	mul lr, r9, r1
+	add lr, r0, lr, asr 23
+	mul r12, r10, lr
+	bic r12, r12, 0xFF0000
+	add r6, r12, r6, ror 8
+	mul r12, r11, lr
+	bic r12, r12, 0xFF0000
+	add r7, r12, r7, ror 8
+	add r9, r9, r8
+	movs lr, r9, lsr 23
+	beq _081DD370
+	bic r9, r9, 0x3F800000
+	subs r2, r2, lr
+	ble _081DD398
+	subs lr, lr, 0x1
+	bne _081DD358
+	add r0, r0, r1
+	b _081DD364
+_081DD358:
+	add r3, r3, lr
+	bl sub_81DD520
+	mov r0, r1
+_081DD364:
+	add r3, r3, 0x1
+	bl sub_81DD520
+	sub r1, r1, r0
+_081DD370:
+	adds r5, r5, 0x40000000
+	bcc _081DD310
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	ldr r6, [sp]
+	subs r6, r6, 0x4
+	str r6, [sp]
+	bgt _081DD308
+	sub r3, r3, 0x1
+	b _081DD4F0
+_081DD398:
+	ldr r0, [sp, 0x1C]
+	cmp r0, 0
+	beq _081DD4F4
+	ldr r3, [r4, o_SoundChannel_wav]
+	ldr r3, [r3, 0x8]
+	rsb lr, r2, 0
+_081DD3B0:
+	adds r2, r2, r0
+	bgt _081DD358
+	sub lr, lr, r0
+	b _081DD3B0
+_081DD3C0:
+	sub r3, r3, 0x1
+	bl sub_81DD520
+	mov r0, r1
+	sub r3, r3, 0x1
+	bl sub_81DD520
+	sub r1, r1, r0
+_081DD3D8:
+	ldr r6, [r5]
+	ldr r7, [r5, 0x630]
+_081DD3E0:
+	mul lr, r9, r1
+	add lr, r0, lr, asr 23
+	mul r12, r10, lr
+	bic r12, r12, 0xFF0000
+	add r6, r12, r6, ror 8
+	mul r12, r11, lr
+	bic r12, r12, 0xFF0000
+	add r7, r12, r7, ror 8
+	add r9, r9, r8
+	movs lr, r9, lsr 23
+	beq _081DD440
+	bic r9, r9, 0x3F800000
+	subs r2, r2, lr
+	ble _081DD4F4
+	subs lr, lr, 0x1
+	bne _081DD428
+	add r0, r0, r1
+	b _081DD434
+_081DD428:
+	sub r3, r3, lr
+	bl sub_81DD520
+	mov r0, r1
+_081DD434:
+	sub r3, r3, 0x1
+	bl sub_81DD520
+	sub r1, r1, r0
+_081DD440:
+	adds r5, r5, 0x40000000
+	bcc _081DD3E0
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	ldr r6, [sp]
+	subs r6, r6, 0x4
+	str r6, [sp]
+	bgt _081DD3D8
+	add r3, r3, 0x2
+	b _081DD4F0
+_081DD468:
+	ldrb r0, [r4, o_SoundChannel_type]
+	tst r0, 0x10
+	beq _081DD4F0
+	ldrsb r0, [r3, -0x1]!
+	ldrsb r1, [r3, -0x1]
+	sub r1, r1, r0
+_081DD480:
+	ldr r6, [r5]
+	ldr r7, [r5, 0x630]
+_081DD488:
+	mul lr, r9, r1
+	add lr, r0, lr, asr 23
+	mul r12, r10, lr
+	bic r12, r12, 0xFF0000
+	add r6, r12, r6, ror 8
+	mul r12, r11, lr
+	bic r12, r12, 0xFF0000
+	add r7, r12, r7, ror 8
+	add r9, r9, r8
+	movs lr, r9, lsr 23
+	beq _081DD4CC
+	bic r9, r9, 0x3F800000
+	subs r2, r2, lr
+	ble _081DD4F4
+	ldrsb r0, [r3, -lr]!
+	ldrsb r1, [r3, -0x1]
+	sub r1, r1, r0
+_081DD4CC:
+	adds r5, r5, 0x40000000
+	bcc _081DD488
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	ldr r6, [sp]
+	subs r6, r6, 0x4
+	str r6, [sp]
+	bgt _081DD480
+	add r3, r3, 0x1
+_081DD4F0:
+	pop {r8,r12,pc}
+_081DD4F4:
+	mov r2, 0
+	strb r2, [r4, o_SoundChannel_status]
+	mov r0, r5, lsr 30
+	bic r5, r5, 0xC0000000
+	rsb r0, r0, 0x3
+	mov r0, r0, lsl 3
+	mov r6, r6, ror r0
+	mov r7, r7, ror r0
+	str r7, [r5, 0x630]
+	str r6, [r5], 0x4
+	pop {r8,r12,pc}
+	arm_func_end sub_81DD264
+
+	arm_func_start sub_81DD520
+sub_81DD520:
+	push {r0,r2,r5-r7,lr}
+	mov r0, r3, lsr 6
+	ldr r1, [r4, o_SoundChannel_xpi]
+	cmp r0, r1
+	beq _081DD594
+	str r0, [r4, o_SoundChannel_xpi]
+	mov r1, 0x21
+	mul r2, r1, r0
+	ldr r1, [r4, o_SoundChannel_wav]
+	add r2, r2, r1
+	add r2, r2, 0x10
+	ldr r5, =0x030007b8
+	ldr r6, =gUnknown_0842F9F4
+	mov r7, 0x40
+	ldrb lr, [r2], 1
+	strb lr, [r5], 1
+	ldrb r1, [r2], 1
+	b _081DD57C
+_081DD568:
+	ldrb r1, [r2], 1
+	mov r0, r1, lsr 4
+	ldrsb r0, [r6, r0]
+	add lr, lr, r0
+	strb lr, [r5], 1
+_081DD57C:
+	and r0, r1, 0xF
+	ldrsb r0, [r6, r0]
+	add lr, lr, r0
+	strb lr, [r5], 1
+	subs r7, r7, 2
+	bgt _081DD568
+_081DD594:
+	ldr r5, =0x030007b8
+	and r0, r3, 0x3F
+	ldrsb r1, [r5, r0]
+	pop {r0,r2,r5-r7,pc}
+	.pool
+	arm_func_end sub_81DD520
+
+	thumb_func_start SoundMainBTM
+SoundMainBTM:
+	mov r12, r4
+	movs r1, 0
+	movs r2, 0
+	movs r3, 0
+	movs r4, 0
+	stm r0!, {r1-r4}
+	stm r0!, {r1-r4}
+	stm r0!, {r1-r4}
+	stm r0!, {r1-r4}
+	mov r4, r12
+	bx lr
+	thumb_func_end SoundMainBTM
+
+	thumb_func_start RealClearChain
+RealClearChain:
+	ldr r3, [r0, 0x2C]
+	cmp r3, 0
+	beq _081DD5E2
+	ldr r1, [r0, 0x34]
+	ldr r2, [r0, 0x30]
+	cmp r2, 0
+	beq _081DD5D6
+	str r1, [r2, 0x34]
+	b _081DD5D8
+_081DD5D6:
+	str r1, [r3, 0x20]
+_081DD5D8:
+	cmp r1, 0
+	beq _081DD5DE
+	str r2, [r1, 0x30]
+_081DD5DE:
+	movs r1, 0
+	str r1, [r0, 0x2C]
+_081DD5E2:
+	bx lr
+	thumb_func_end RealClearChain
+
+	thumb_func_start ply_fine
+ply_fine:
+	push {r4,r5,lr}
+	adds r5, r1, 0
+	ldr r4, [r5, 0x20]
+	cmp r4, 0
+	beq ply_fine_done
+ply_fine_loop:
+	ldrb r1, [r4]
+	movs r0, 0xC7
+	tst r0, r1
+	beq ply_fine_ok
+	movs r0, 0x40
+	orrs r1, r0
+	strb r1, [r4]
+ply_fine_ok:
+	adds r0, r4, 0
+	bl RealClearChain
+	ldr r4, [r4, 0x34]
+	cmp r4, 0
+	bne ply_fine_loop
+ply_fine_done:
+	movs r0, 0
+	strb r0, [r5]
+	pop {r4,r5}
+	pop {r0}
+	bx r0
+	thumb_func_end ply_fine
+
+	thumb_func_start MPlayJumpTableCopy
+MPlayJumpTableCopy:
+	mov r12, lr
+	movs r1, 0x24
+	ldr r2, lt_MPlayJumpTableTemplate
+MPlayJumpTableCopy_Loop:
+	ldr r3, [r2]
+	bl chk_adr_r2
+	stm r0!, {r3}
+	adds r2, 0x4
+	subs r1, 0x1
+	bgt MPlayJumpTableCopy_Loop
+	bx r12
+	thumb_func_end MPlayJumpTableCopy
+
+	.align 2, 0
+	.thumb_func
+ldrb_r3_r2:
+	ldrb r3, [r2]
+
+@ This attempts to protect against reading anything from the BIOS ROM
+@ besides the jump table template.
+@ It assumes that the jump table template is located at the end of the ROM.
+	.thumb_func
+chk_adr_r2:
+	push {r0}
+	lsrs r0, r2, 25
+	bne chk_adr_r2_done @ if adr >= 0x2000000 (i.e. not in BIOS ROM), accept it
+	ldr r0, lt_MPlayJumpTableTemplate
+	cmp r2, r0
+	blo chk_adr_r2_reject @ if adr < gMPlayJumpTableTemplate, reject it
+	lsrs r0, r2, 14
+	beq chk_adr_r2_done @ if adr < 0x40000 (i.e. in BIOS ROM), accept it
+chk_adr_r2_reject:
+	movs r3, 0
+chk_adr_r2_done:
+	pop {r0}
+	bx lr
+
+	.align 2, 0
+lt_MPlayJumpTableTemplate: .word gMPlayJumpTableTemplate
+
+	thumb_func_start ld_r3_tp_adr_i
+ld_r3_tp_adr_i:
+	ldr r2, [r1, 0x40]
+_081DD64A:
+	adds r3, r2, 0x1
+	str r3, [r1, 0x40]
+	ldrb r3, [r2]
+	b chk_adr_r2
+	thumb_func_end ld_r3_tp_adr_i
+
+	thumb_func_start ply_goto
+ply_goto:
+	push {lr}
+ply_goto_1:
+	ldr r2, [r1, 0x40]
+	ldrb r0, [r2, 0x3]
+	lsls r0, 8
+	ldrb r3, [r2, 0x2]
+	orrs r0, r3
+	lsls r0, 8
+	ldrb r3, [r2, 0x1]
+	orrs r0, r3
+	lsls r0, 8
+	bl ldrb_r3_r2
+	orrs r0, r3
+	str r0, [r1, 0x40]
+	pop {r0}
+	bx r0
+	thumb_func_end ply_goto
+
+	thumb_func_start ply_patt
+ply_patt:
+	ldrb r2, [r1, 0x2]
+	cmp r2, 0x3
+	bcs ply_patt_done
+	lsls r2, 2
+	adds r3, r1, r2
+	ldr r2, [r1, 0x40]
+	adds r2, 0x4
+	str r2, [r3, 0x44]
+	ldrb r2, [r1, 0x2]
+	adds r2, 0x1
+	strb r2, [r1, 0x2]
+	b ply_goto
+ply_patt_done:
+	b ply_fine
+	thumb_func_end ply_patt
+
+	thumb_func_start ply_pend
+ply_pend:
+	ldrb r2, [r1, 0x2]
+	cmp r2, 0
+	beq ply_pend_done
+	subs r2, 0x1
+	strb r2, [r1, 0x2]
+	lsls r2, 2
+	adds r3, r1, r2
+	ldr r2, [r3, 0x44]
+	str r2, [r1, 0x40]
+ply_pend_done:
+	bx lr
+	thumb_func_end ply_pend
+
+	thumb_func_start ply_rept
+ply_rept:
+	push {lr}
+	ldr r2, [r1, 0x40]
+	ldrb r3, [r2]
+	cmp r3, 0
+	bne ply_rept_1
+	adds r2, 0x1
+	str r2, [r1, 0x40]
+	b ply_goto_1
+ply_rept_1:
+	ldrb r3, [r1, 0x3]
+	adds r3, 0x1
+	strb r3, [r1, 0x3]
+	mov r12, r3
+	bl ld_r3_tp_adr_i
+	cmp r12, r3
+	bcs ply_rept_2
+	b ply_goto_1
+ply_rept_2:
+	movs r3, 0
+	strb r3, [r1, 0x3]
+	adds r2, 0x5
+	str r2, [r1, 0x40]
+	pop {r0}
+	bx r0
+	thumb_func_end ply_rept
+
+	thumb_func_start ply_prio
+ply_prio:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	strb r3, [r1, 0x1D]
+	bx r12
+	thumb_func_end ply_prio
+
+	thumb_func_start ply_tempo
+ply_tempo:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	lsls r3, 1
+	strh r3, [r0, 0x1C]
+	ldrh r2, [r0, 0x1E]
+	muls r3, r2
+	lsrs r3, 8
+	strh r3, [r0, 0x20]
+	bx r12
+	thumb_func_end ply_tempo
+
+	thumb_func_start ply_keysh
+ply_keysh:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	strb r3, [r1, 0xA]
+	ldrb r3, [r1]
+	movs r2, 0xC
+	orrs r3, r2
+	strb r3, [r1]
+	bx r12
+	thumb_func_end ply_keysh
+
+	thumb_func_start ply_voice
+ply_voice:
+	mov r12, lr
+	ldr r2, [r1, 0x40]
+	ldrb r3, [r2]
+	adds r2, 0x1
+	str r2, [r1, 0x40]
+	lsls r2, r3, 1
+	adds r2, r3
+	lsls r2, 2
+	ldr r3, [r0, 0x30]
+	adds r2, r3
+	ldr r3, [r2]
+	bl chk_adr_r2
+	str r3, [r1, 0x24]
+	ldr r3, [r2, 0x4]
+	bl chk_adr_r2
+	str r3, [r1, 0x28]
+	ldr r3, [r2, 0x8]
+	bl chk_adr_r2
+	str r3, [r1, 0x2C]
+	bx r12
+	thumb_func_end ply_voice
+
+	thumb_func_start ply_vol
+ply_vol:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	strb r3, [r1, 0x12]
+	ldrb r3, [r1]
+	movs r2, 0x3
+	orrs r3, r2
+	strb r3, [r1]
+	bx r12
+	thumb_func_end ply_vol
+
+	thumb_func_start ply_pan
+ply_pan:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	subs r3, 0x40
+	strb r3, [r1, 0x14]
+	ldrb r3, [r1]
+	movs r2, 0x3
+	orrs r3, r2
+	strb r3, [r1]
+	bx r12
+	thumb_func_end ply_pan
+
+	thumb_func_start ply_bend
+ply_bend:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	subs r3, 0x40
+	strb r3, [r1, 0xE]
+	ldrb r3, [r1]
+	movs r2, 0xC
+	orrs r3, r2
+	strb r3, [r1]
+	bx r12
+	thumb_func_end ply_bend
+
+	thumb_func_start ply_bendr
+ply_bendr:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	strb r3, [r1, 0xF]
+	ldrb r3, [r1]
+	movs r2, 0xC
+	orrs r3, r2
+	strb r3, [r1]
+	bx r12
+	thumb_func_end ply_bendr
+
+	thumb_func_start ply_lfodl
+ply_lfodl:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	strb r3, [r1, 0x1B]
+	bx r12
+	thumb_func_end ply_lfodl
+
+	thumb_func_start ply_modt
+ply_modt:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	ldrb r0, [r1, 0x18]
+	cmp r0, r3
+	beq _081DD7AA
+	strb r3, [r1, 0x18]
+	ldrb r3, [r1]
+	movs r2, 0xF
+	orrs r3, r2
+	strb r3, [r1]
+_081DD7AA:
+	bx r12
+	thumb_func_end ply_modt
+
+	thumb_func_start ply_tune
+ply_tune:
+	mov r12, lr
+	bl ld_r3_tp_adr_i
+	subs r3, 0x40
+	strb r3, [r1, 0xC]
+	ldrb r3, [r1]
+	movs r2, 0xC
+	orrs r3, r2
+	strb r3, [r1]
+	bx r12
+	thumb_func_end ply_tune
+
+	thumb_func_start ply_port
+ply_port:
+	mov r12, lr
+	ldr r2, [r1, 0x40]
+	ldrb r3, [r2]
+	adds r2, 0x1
+	ldr r0, =REG_SOUND1CNT_L @ sound register base address
+	adds r0, r3
+	bl _081DD64A
+	strb r3, [r0]
+	bx r12
+	.pool
+	thumb_func_end ply_port
+
+	thumb_func_start m4aSoundVSync
+m4aSoundVSync:
+	ldr r0, lt2_SOUND_INFO_PTR
+	ldr r0, [r0]
+
+	@ Exit the function if ident is not ID_NUMBER or ID_NUMBER+1.
+	ldr r2, lt2_ID_NUMBER
+	ldr r3, [r0, o_SoundInfo_ident]
+	subs r3, r2
+	cmp r3, 1
+	bhi m4aSoundVSync_Done
+
+	@ Decrement the PCM DMA counter. If it reaches 0, we need to do a DMA.
+	ldrb r1, [r0, o_SoundInfo_pcmDmaCounter]
+	subs r1, 1
+	strb r1, [r0, o_SoundInfo_pcmDmaCounter]
+	bgt m4aSoundVSync_Done
+
+	@ Reload the PCM DMA counter.
+	ldrb r1, [r0, o_SoundInfo_pcmDmaPeriod]
+	strb r1, [r0, o_SoundInfo_pcmDmaCounter]
+
+	ldr r2, =REG_DMA1
+
+	ldr r1, [r2, 0x8] @ DMA1CNT
+	lsls r1, 7
+	bcc m4aSoundVSync_SkipDMA1 @ branch if repeat bit isn't set
+
+	ldr r1, =((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4
+	str r1, [r2, 0x8] @ DMA1CNT
+
+m4aSoundVSync_SkipDMA1:
+	ldr r1, [r2, 0xC + 0x8] @ DMA2CNT
+	lsls r1, 7
+	bcc m4aSoundVSync_SkipDMA2 @ branch if repeat bit isn't set
+
+	ldr r1, =((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4
+	str r1, [r2, 0xC + 0x8] @ DMA2CNT
+
+m4aSoundVSync_SkipDMA2:
+
+	@ turn off DMA1/DMA2
+	movs r1, DMA_32BIT >> 8
+	lsls r1, 8
+	strh r1, [r2, 0xA]       @ DMA1CNT_H
+	strh r1, [r2, 0xC + 0xA] @ DMA2CNT_H
+
+	@ turn on DMA1/DMA2 direct-sound FIFO mode
+	movs r1, (DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT) >> 8
+	lsls r1, 8 @ LSB is 0, so DMA_SRC_INC is used (destination is always fixed in FIFO mode)
+	strh r1, [r2, 0xA]       @ DMA1CNT_H
+	strh r1, [r2, 0xC + 0xA] @ DMA2CNT_H
+
+m4aSoundVSync_Done:
+	bx lr
+
+	.pool
+	thumb_func_end m4aSoundVSync
+
+	thumb_func_start MPlayMain
+MPlayMain:
+	ldr r2, lt2_ID_NUMBER
+	ldr r3, [r0, 0x34]
+	cmp r2, r3
+	beq _081DD82E
+	bx lr
+_081DD82E:
+	adds r3, 0x1
+	str r3, [r0, 0x34]
+	push {r0,lr}
+	ldr r3, [r0, 0x38]
+	cmp r3, 0
+	beq _081DD840
+	ldr r0, [r0, 0x3C]
+	bl _081DDA7C
+_081DD840:
+	pop {r0}
+	push {r4-r7}
+	mov r4, r8
+	mov r5, r9
+	mov r6, r10
+	mov r7, r11
+	push {r4-r7}
+	adds r7, r0, 0
+	ldr r0, [r7, 0x4]
+	cmp r0, 0
+	bge _081DD858
+	b _081DDA6C
+_081DD858:
+	ldr r0, lt2_SOUND_INFO_PTR
+	ldr r0, [r0]
+	mov r8, r0
+	adds r0, r7, 0
+	bl FadeOutBody
+	ldr r0, [r7, 0x4]
+	cmp r0, 0
+	bge _081DD86C
+	b _081DDA6C
+_081DD86C:
+	ldrh r0, [r7, 0x22]
+	ldrh r1, [r7, 0x20]
+	adds r0, r1
+	b _081DD9BC
+_081DD874:
+	ldrb r6, [r7, 0x8]
+	ldr r5, [r7, 0x2C]
+	movs r3, 0x1
+	movs r4, 0
+_081DD87C:
+	ldrb r0, [r5]
+	movs r1, 0x80
+	tst r1, r0
+	bne _081DD886
+	b _081DD998
+_081DD886:
+	mov r10, r3
+	orrs r4, r3
+	mov r11, r4
+	ldr r4, [r5, 0x20]
+	cmp r4, 0
+	beq _081DD8BA
+_081DD892:
+	ldrb r1, [r4]
+	movs r0, 0xC7
+	tst r0, r1
+	beq _081DD8AE
+	ldrb r0, [r4, 0x10]
+	cmp r0, 0
+	beq _081DD8B4
+	subs r0, 0x1
+	strb r0, [r4, 0x10]
+	bne _081DD8B4
+	movs r0, 0x40
+	orrs r1, r0
+	strb r1, [r4]
+	b _081DD8B4
+_081DD8AE:
+	adds r0, r4, 0
+	bl ClearChain
+_081DD8B4:
+	ldr r4, [r4, 0x34]
+	cmp r4, 0
+	bne _081DD892
+_081DD8BA:
+	ldrb r3, [r5]
+	movs r0, 0x40
+	tst r0, r3
+	beq _081DD938
+	adds r0, r5, 0
+	bl Clear64byte
+	movs r0, 0x80
+	strb r0, [r5]
+	movs r0, 0x2
+	strb r0, [r5, 0xF]
+	movs r0, 0x40
+	strb r0, [r5, 0x13]
+	movs r0, 0x16
+	strb r0, [r5, 0x19]
+	movs r0, 0x1
+	adds r1, r5, 0x6
+	strb r0, [r1, 0x1E]
+	b _081DD938
+_081DD8E0:
+	ldr r2, [r5, 0x40]
+	ldrb r1, [r2]
+	cmp r1, 0x80
+	bcs _081DD8EC
+	ldrb r1, [r5, 0x7]
+	b _081DD8F6
+_081DD8EC:
+	adds r2, 0x1
+	str r2, [r5, 0x40]
+	cmp r1, 0xBD
+	bcc _081DD8F6
+	strb r1, [r5, 0x7]
+_081DD8F6:
+	cmp r1, 0xCF
+	bcc _081DD90C
+	mov r0, r8
+	ldr r3, [r0, 0x38]
+	adds r0, r1, 0
+	subs r0, 0xCF
+	adds r1, r7, 0
+	adds r2, r5, 0
+	bl _081DDA7C
+	b _081DD938
+_081DD90C:
+	cmp r1, 0xB0
+	bls _081DD92E
+	adds r0, r1, 0
+	subs r0, 0xB1
+	strb r0, [r7, 0xA]
+	mov r3, r8
+	ldr r3, [r3, 0x34]
+	lsls r0, 2
+	ldr r3, [r3, r0]
+	adds r0, r7, 0
+	adds r1, r5, 0
+	bl _081DDA7C
+	ldrb r0, [r5]
+	cmp r0, 0
+	beq _081DD994
+	b _081DD938
+_081DD92E:
+	ldr r0, lt_gClockTable
+	subs r1, 0x80
+	adds r1, r0
+	ldrb r0, [r1]
+	strb r0, [r5, 0x1]
+_081DD938:
+	ldrb r0, [r5, 0x1]
+	cmp r0, 0
+	beq _081DD8E0
+	subs r0, 0x1
+	strb r0, [r5, 0x1]
+	ldrb r1, [r5, 0x19]
+	cmp r1, 0
+	beq _081DD994
+	ldrb r0, [r5, 0x17]
+	cmp r0, 0
+	beq _081DD994
+	ldrb r0, [r5, 0x1C]
+	cmp r0, 0
+	beq _081DD95A
+	subs r0, 0x1
+	strb r0, [r5, 0x1C]
+	b _081DD994
+_081DD95A:
+	ldrb r0, [r5, 0x1A]
+	adds r0, r1
+	strb r0, [r5, 0x1A]
+	adds r1, r0, 0
+	subs r0, 0x40
+	lsls r0, 24
+	bpl _081DD96E
+	lsls r2, r1, 24
+	asrs r2, 24
+	b _081DD972
+_081DD96E:
+	movs r0, 0x80
+	subs r2, r0, r1
+_081DD972:
+	ldrb r0, [r5, 0x17]
+	muls r0, r2
+	asrs r2, r0, 6
+	ldrb r0, [r5, 0x16]
+	eors r0, r2
+	lsls r0, 24
+	beq _081DD994
+	strb r2, [r5, 0x16]
+	ldrb r0, [r5]
+	ldrb r1, [r5, 0x18]
+	cmp r1, 0
+	bne _081DD98E
+	movs r1, 0xC
+	b _081DD990
+_081DD98E:
+	movs r1, 0x3
+_081DD990:
+	orrs r0, r1
+	strb r0, [r5]
+_081DD994:
+	mov r3, r10
+	mov r4, r11
+_081DD998:
+	subs r6, 0x1
+	ble _081DD9A4
+	movs r0, 0x50
+	adds r5, r0
+	lsls r3, 1
+	b _081DD87C
+_081DD9A4:
+	ldr r0, [r7, 0xC]
+	adds r0, 0x1
+	str r0, [r7, 0xC]
+	cmp r4, 0
+	bne _081DD9B6
+	movs r0, 0x80
+	lsls r0, 24
+	str r0, [r7, 0x4]
+	b _081DDA6C
+_081DD9B6:
+	str r4, [r7, 0x4]
+	ldrh r0, [r7, 0x22]
+	subs r0, 0x96
+_081DD9BC:
+	strh r0, [r7, 0x22]
+	cmp r0, 0x96
+	bcc _081DD9C4
+	b _081DD874
+_081DD9C4:
+	ldrb r2, [r7, 0x8]
+	ldr r5, [r7, 0x2C]
+_081DD9C8:
+	ldrb r0, [r5]
+	movs r1, 0x80
+	tst r1, r0
+	beq _081DDA62
+	movs r1, 0xF
+	tst r1, r0
+	beq _081DDA62
+	mov r9, r2
+	adds r0, r7, 0
+	adds r1, r5, 0
+	bl TrkVolPitSet
+	ldr r4, [r5, 0x20]
+	cmp r4, 0
+	beq _081DDA58
+_081DD9E6:
+	ldrb r1, [r4]
+	movs r0, 0xC7
+	tst r0, r1
+	bne _081DD9F6
+	adds r0, r4, 0
+	bl ClearChain
+	b _081DDA52
+_081DD9F6:
+	ldrb r0, [r4, 0x1]
+	movs r6, 0x7
+	ands r6, r0
+	ldrb r3, [r5]
+	movs r0, 0x3
+	tst r0, r3
+	beq _081DDA14
+	bl ChnVolSetAsm
+	cmp r6, 0
+	beq _081DDA14
+	ldrb r0, [r4, 0x1D]
+	movs r1, 0x1
+	orrs r0, r1
+	strb r0, [r4, 0x1D]
+_081DDA14:
+	ldrb r3, [r5]
+	movs r0, 0xC
+	tst r0, r3
+	beq _081DDA52
+	ldrb r1, [r4, 0x8]
+	movs r0, 0x8
+	ldrsb r0, [r5, r0]
+	adds r2, r1, r0
+	bpl _081DDA28
+	movs r2, 0
+_081DDA28:
+	cmp r6, 0
+	beq _081DDA46
+	mov r0, r8
+	ldr r3, [r0, 0x30]
+	adds r1, r2, 0
+	ldrb r2, [r5, 0x9]
+	adds r0, r6, 0
+	bl _081DDA7C
+	str r0, [r4, 0x20]
+	ldrb r0, [r4, 0x1D]
+	movs r1, 0x2
+	orrs r0, r1
+	strb r0, [r4, 0x1D]
+	b _081DDA52
+_081DDA46:
+	adds r1, r2, 0
+	ldrb r2, [r5, 0x9]
+	ldr r0, [r4, 0x24]
+	bl MidiKeyToFreq
+	str r0, [r4, 0x20]
+_081DDA52:
+	ldr r4, [r4, 0x34]
+	cmp r4, 0
+	bne _081DD9E6
+_081DDA58:
+	ldrb r0, [r5]
+	movs r1, 0xF0
+	ands r0, r1
+	strb r0, [r5]
+	mov r2, r9
+_081DDA62:
+	subs r2, 0x1
+	ble _081DDA6C
+	movs r0, 0x50
+	adds r5, r0
+	bgt _081DD9C8
+_081DDA6C:
+	ldr r0, lt2_ID_NUMBER
+	str r0, [r7, 0x34]
+	pop {r0-r7}
+	mov r8, r0
+	mov r9, r1
+	mov r10, r2
+	mov r11, r3
+	pop {r3}
+_081DDA7C:
+	bx r3
+
+	.align 2, 0
+lt_gClockTable:     .word gClockTable
+lt2_SOUND_INFO_PTR: .word SOUND_INFO_PTR
+lt2_ID_NUMBER:      .word ID_NUMBER
+	thumb_func_end MPlayMain
+
+	thumb_func_start TrackStop
+TrackStop:
+	push {r4-r6,lr}
+	adds r5, r1, 0
+	ldrb r1, [r5]
+	movs r0, 0x80
+	tst r0, r1
+	beq TrackStop_Done
+	ldr r4, [r5, 0x20]
+	cmp r4, 0
+	beq TrackStop_3
+	movs r6, 0
+TrackStop_Loop:
+	ldrb r0, [r4]
+	cmp r0, 0
+	beq TrackStop_2
+	ldrb r0, [r4, 0x1]
+	movs r3, 0x7
+	ands r0, r3
+	beq TrackStop_1
+	ldr r3, =SOUND_INFO_PTR
+	ldr r3, [r3]
+	ldr r3, [r3, 0x2C]
+	bl _081DDA7C
+TrackStop_1:
+	strb r6, [r4]
+TrackStop_2:
+	str r6, [r4, 0x2C]
+	ldr r4, [r4, 0x34]
+	cmp r4, 0
+	bne TrackStop_Loop
+TrackStop_3:
+	str r4, [r5, 0x20]
+TrackStop_Done:
+	pop {r4-r6}
+	pop {r0}
+	bx r0
+	.pool
+	thumb_func_end TrackStop
+
+	thumb_func_start ChnVolSetAsm
+ChnVolSetAsm:
+	ldrb r1, [r4, 0x12]
+	movs r0, 0x14
+	ldrsb r2, [r4, r0]
+	movs r3, 0x80
+	adds r3, r2
+	muls r3, r1
+	ldrb r0, [r5, 0x10]
+	muls r0, r3
+	asrs r0, 14
+	cmp r0, 0xFF
+	bls _081DDAE8
+	movs r0, 0xFF
+_081DDAE8:
+	strb r0, [r4, 0x2]
+	movs r3, 0x7F
+	subs r3, r2
+	muls r3, r1
+	ldrb r0, [r5, 0x11]
+	muls r0, r3
+	asrs r0, 14
+	cmp r0, 0xFF
+	bls _081DDAFC
+	movs r0, 0xFF
+_081DDAFC:
+	strb r0, [r4, 0x3]
+	bx lr
+	thumb_func_end ChnVolSetAsm
+
+	thumb_func_start ply_note
+ply_note:
+	push {r4-r7,lr}
+	mov r4, r8
+	mov r5, r9
+	mov r6, r10
+	mov r7, r11
+	push {r4-r7}
+	sub sp, 0x18
+	str r1, [sp]
+	adds r5, r2, 0
+	ldr r1, =SOUND_INFO_PTR
+	ldr r1, [r1]
+	str r1, [sp, 0x4]
+	ldr r1, =gClockTable
+	adds r0, r1
+	ldrb r0, [r0]
+	strb r0, [r5, 0x4]
+	ldr r3, [r5, o_MusicPlayerTrack_cmdPtr]
+	ldrb r0, [r3]
+	cmp r0, 0x80
+	bcs _081DDB46
+	strb r0, [r5, o_MusicPlayerTrack_key]
+	adds r3, 0x1
+	ldrb r0, [r3]
+	cmp r0, 0x80
+	bcs _081DDB44
+	strb r0, [r5, 0x6]
+	adds r3, 0x1
+	ldrb r0, [r3]
+	cmp r0, 0x80
+	bcs _081DDB44
+	ldrb r1, [r5, 0x4]
+	adds r1, r0
+	strb r1, [r5, 0x4]
+	adds r3, 0x1
+_081DDB44:
+	str r3, [r5, o_MusicPlayerTrack_cmdPtr]
+_081DDB46:
+	movs r0, 0
+	str r0, [sp, 0x14]
+	adds r4, r5, 0
+	adds r4, 0x24
+	ldrb r2, [r4]
+	movs r0, 0xC0
+	tst r0, r2
+	beq _081DDB98
+	ldrb r3, [r5, 0x5]
+	movs r0, 0x40
+	tst r0, r2
+	beq _081DDB66
+	ldr r1, [r5, 0x2C]
+	adds r1, r3
+	ldrb r0, [r1]
+	b _081DDB68
+_081DDB66:
+	adds r0, r3, 0
+_081DDB68:
+	lsls r1, r0, 1
+	adds r1, r0
+	lsls r1, 2
+	ldr r0, [r5, 0x28]
+	adds r1, r0
+	mov r9, r1
+	mov r6, r9
+	ldrb r1, [r6]
+	movs r0, 0xC0
+	tst r0, r1
+	beq _081DDB80
+	b _081DDCEA
+_081DDB80:
+	movs r0, 0x80
+	tst r0, r2
+	beq _081DDB9C
+	ldrb r1, [r6, 0x3]
+	movs r0, 0x80
+	tst r0, r1
+	beq _081DDB94
+	subs r1, 0xC0
+	lsls r1, 1
+	str r1, [sp, 0x14]
+_081DDB94:
+	ldrb r3, [r6, 0x1]
+	b _081DDB9C
+_081DDB98:
+	mov r9, r4
+	ldrb r3, [r5, 0x5]
+_081DDB9C:
+	str r3, [sp, 0x8]
+	ldr r6, [sp]
+	ldrb r1, [r6, 0x9]
+	ldrb r0, [r5, 0x1D]
+	adds r0, r1
+	cmp r0, 0xFF
+	bls _081DDBAC
+	movs r0, 0xFF
+_081DDBAC:
+	str r0, [sp, 0x10]
+	mov r6, r9
+	ldrb r0, [r6]
+	movs r6, 0x7
+	ands r6, r0
+	str r6, [sp, 0xC]
+	beq _081DDBEC
+	ldr r0, [sp, 0x4]
+	ldr r4, [r0, 0x1C]
+	cmp r4, 0
+	bne _081DDBC4
+	b _081DDCEA
+_081DDBC4:
+	subs r6, 0x1
+	lsls r0, r6, 6
+	adds r4, r0
+	ldrb r1, [r4]
+	movs r0, 0xC7
+	tst r0, r1
+	beq _081DDC40
+	movs r0, 0x40
+	tst r0, r1
+	bne _081DDC40
+	ldrb r1, [r4, 0x13]
+	ldr r0, [sp, 0x10]
+	cmp r1, r0
+	bcc _081DDC40
+	beq _081DDBE4
+	b _081DDCEA
+_081DDBE4:
+	ldr r0, [r4, 0x2C]
+	cmp r0, r5
+	bcs _081DDC40
+	b _081DDCEA
+_081DDBEC:
+	ldr r6, [sp, 0x10]
+	adds r7, r5, 0
+	movs r2, 0
+	mov r8, r2
+	ldr r4, [sp, 0x4]
+	ldrb r3, [r4, 0x6]
+	adds r4, 0x50
+_081DDBFA:
+	ldrb r1, [r4]
+	movs r0, 0xC7
+	tst r0, r1
+	beq _081DDC40
+	movs r0, 0x40
+	tst r0, r1
+	beq _081DDC14
+	cmp r2, 0
+	bne _081DDC18
+	adds r2, 0x1
+	ldrb r6, [r4, 0x13]
+	ldr r7, [r4, 0x2C]
+	b _081DDC32
+_081DDC14:
+	cmp r2, 0
+	bne _081DDC34
+_081DDC18:
+	ldrb r0, [r4, 0x13]
+	cmp r0, r6
+	bcs _081DDC24
+	adds r6, r0, 0
+	ldr r7, [r4, 0x2C]
+	b _081DDC32
+_081DDC24:
+	bhi _081DDC34
+	ldr r0, [r4, 0x2C]
+	cmp r0, r7
+	bls _081DDC30
+	adds r7, r0, 0
+	b _081DDC32
+_081DDC30:
+	bcc _081DDC34
+_081DDC32:
+	mov r8, r4
+_081DDC34:
+	adds r4, 0x40
+	subs r3, 0x1
+	bgt _081DDBFA
+	mov r4, r8
+	cmp r4, 0
+	beq _081DDCEA
+_081DDC40:
+	adds r0, r4, 0
+	bl ClearChain
+	movs r1, 0
+	str r1, [r4, 0x30]
+	ldr r3, [r5, 0x20]
+	str r3, [r4, 0x34]
+	cmp r3, 0
+	beq _081DDC54
+	str r4, [r3, 0x30]
+_081DDC54:
+	str r4, [r5, 0x20]
+	str r5, [r4, 0x2C]
+	ldrb r0, [r5, 0x1B]
+	strb r0, [r5, 0x1C]
+	cmp r0, r1
+	beq _081DDC66
+	adds r1, r5, 0
+	bl clear_modM
+_081DDC66:
+	ldr r0, [sp]
+	adds r1, r5, 0
+	bl TrkVolPitSet
+	ldr r0, [r5, 0x4]
+	str r0, [r4, 0x10]
+	ldr r0, [sp, 0x10]
+	strb r0, [r4, 0x13]
+	ldr r0, [sp, 0x8]
+	strb r0, [r4, 0x8]
+	ldr r0, [sp, 0x14]
+	strb r0, [r4, 0x14]
+	mov r6, r9
+	ldrb r0, [r6]
+	strb r0, [r4, 0x1]
+	ldr r7, [r6, 0x4]
+	str r7, [r4, 0x24]
+	ldr r0, [r6, 0x8]
+	str r0, [r4, 0x4]
+	ldrh r0, [r5, 0x1E]
+	strh r0, [r4, 0xC]
+	bl ChnVolSetAsm
+	ldrb r1, [r4, 0x8]
+	movs r0, 0x8
+	ldrsb r0, [r5, r0]
+	adds r3, r1, r0
+	bpl _081DDCA0
+	movs r3, 0
+_081DDCA0:
+	ldr r6, [sp, 0xC]
+	cmp r6, 0
+	beq _081DDCCE
+	mov r6, r9
+	ldrb r0, [r6, 0x2]
+	strb r0, [r4, 0x1E]
+	ldrb r1, [r6, 0x3]
+	movs r0, 0x80
+	tst r0, r1
+	bne _081DDCBA
+	movs r0, 0x70
+	tst r0, r1
+	bne _081DDCBC
+_081DDCBA:
+	movs r1, 0x8
+_081DDCBC:
+	strb r1, [r4, 0x1F]
+	ldrb r2, [r5, 0x9]
+	adds r1, r3, 0
+	ldr r0, [sp, 0xC]
+	ldr r3, [sp, 0x4]
+	ldr r3, [r3, 0x30]
+	bl _081DDA7C
+	b _081DDCDC
+_081DDCCE:
+	ldr r0, [r5, o_MusicPlayerTrack_unk_3C]
+	str r0, [r4, 0x18]
+	ldrb r2, [r5, 0x9]
+	adds r1, r3, 0
+	adds r0, r7, 0
+	bl MidiKeyToFreq
+_081DDCDC:
+	str r0, [r4, 0x20]
+	movs r0, 0x80
+	strb r0, [r4]
+	ldrb r1, [r5]
+	movs r0, 0xF0
+	ands r0, r1
+	strb r0, [r5]
+_081DDCEA:
+	add sp, 0x18
+	pop {r0-r7}
+	mov r8, r0
+	mov r9, r1
+	mov r10, r2
+	mov r11, r3
+	pop {r0}
+	bx r0
+	.pool
+	thumb_func_end ply_note
+
+	thumb_func_start ply_endtie
+ply_endtie:
+	push {r4,r5}
+	ldr r2, [r1, 0x40]
+	ldrb r3, [r2]
+	cmp r3, 0x80
+	bcs _081DDD16
+	strb r3, [r1, 0x5]
+	adds r2, 0x1
+	str r2, [r1, 0x40]
+	b _081DDD18
+_081DDD16:
+	ldrb r3, [r1, 0x5]
+_081DDD18:
+	ldr r1, [r1, 0x20]
+	cmp r1, 0
+	beq _081DDD40
+	movs r4, 0x83
+	movs r5, 0x40
+_081DDD22:
+	ldrb r2, [r1]
+	tst r2, r4
+	beq _081DDD3A
+	tst r2, r5
+	bne _081DDD3A
+	ldrb r0, [r1, 0x11]
+	cmp r0, r3
+	bne _081DDD3A
+	movs r0, 0x40
+	orrs r2, r0
+	strb r2, [r1]
+	b _081DDD40
+_081DDD3A:
+	ldr r1, [r1, 0x34]
+	cmp r1, 0
+	bne _081DDD22
+_081DDD40:
+	pop {r4,r5}
+	bx lr
+	thumb_func_end ply_endtie
+
+	thumb_func_start clear_modM
+clear_modM:
+	movs r2, 0
+	strb r2, [r1, 0x16]
+	strb r2, [r1, 0x1A]
+	ldrb r2, [r1, 0x18]
+	cmp r2, 0
+	bne _081DDD54
+	movs r2, 0xC
+	b _081DDD56
+_081DDD54:
+	movs r2, 0x3
+_081DDD56:
+	ldrb r3, [r1]
+	orrs r3, r2
+	strb r3, [r1]
+	bx lr
+	thumb_func_end clear_modM
+
+	thumb_func_start ld_r3_tp_adr_i
+ld_r3_tp_adr_i_unchecked:
+	ldr r2, [r1, 0x40]
+	adds r3, r2, 0x1
+	str r3, [r1, 0x40]
+	ldrb r3, [r2]
+	bx lr
+	thumb_func_end ld_r3_tp_adr_i
+
+	thumb_func_start ply_lfos
+ply_lfos:
+	mov r12, lr
+	bl ld_r3_tp_adr_i_unchecked
+	strb r3, [r1, 0x19]
+	cmp r3, 0
+	bne _081DDD7C
+	bl clear_modM
+_081DDD7C:
+	bx r12
+	thumb_func_end ply_lfos
+
+	thumb_func_start ply_mod
+ply_mod:
+	mov r12, lr
+	bl ld_r3_tp_adr_i_unchecked
+	strb r3, [r1, 0x17]
+	cmp r3, 0
+	bne _081DDD90
+	bl clear_modM
+_081DDD90:
+	bx r12
+	thumb_func_end ply_mod
+
+	.align 2, 0 @ Don't pad with nop.
diff --git a/asm/m4a_3.s b/asm/m4a_3.s
new file mode 100644
index 000000000..68cd8803a
--- /dev/null
+++ b/asm/m4a_3.s
@@ -0,0 +1,574 @@
+	.include "asm/macros.s"
+	.include "constants/gba_constants.s"
+	.include "constants/m4a_constants.s"
+
+	.syntax unified
+
+	.text
+
+	thumb_func_start CgbSound
+CgbSound: @ 81DEA70
+	push {r4-r7,lr}
+	mov r7, r10
+	mov r6, r9
+	mov r5, r8
+	push {r5-r7}
+	sub sp, 0x1C
+	ldr r0, =SOUND_INFO_PTR
+	ldr r0, [r0]
+	str r0, [sp, 0x4]
+	ldrb r0, [r0, 0xA]
+	cmp r0, 0
+	beq _081DEA94
+	subs r0, 0x1
+	ldr r1, [sp, 0x4]
+	strb r0, [r1, 0xA]
+	b _081DEA9A
+	.pool
+_081DEA94:
+	movs r0, 0xE
+	ldr r2, [sp, 0x4]
+	strb r0, [r2, 0xA]
+_081DEA9A:
+	movs r6, 0x1
+	ldr r0, [sp, 0x4]
+	ldr r4, [r0, 0x1C]
+_081DEAA0:
+	ldrb r1, [r4]
+	movs r0, 0xC7
+	ands r0, r1
+	adds r2, r6, 0x1
+	mov r10, r2
+	movs r2, 0x40
+	adds r2, r4
+	mov r9, r2
+	cmp r0, 0
+	bne _081DEAB6
+	b _081DEEA0
+_081DEAB6:
+	cmp r6, 0x2
+	beq _081DEAE8
+	cmp r6, 0x2
+	bgt _081DEAC4
+	cmp r6, 0x1
+	beq _081DEACA
+	b _081DEB20
+_081DEAC4:
+	cmp r6, 0x3
+	beq _081DEB00
+	b _081DEB20
+_081DEACA:
+	ldr r0, =REG_NR10
+	str r0, [sp, 0x8]
+	ldr r7, =REG_NR11
+	ldr r2, =REG_NR12
+	str r2, [sp, 0xC]
+	adds r0, 0x4
+	str r0, [sp, 0x10]
+	adds r2, 0x2
+	b _081DEB30
+	.pool
+_081DEAE8:
+	ldr r0, =REG_NR10 + 1
+	str r0, [sp, 0x8]
+	ldr r7, =REG_NR21
+	ldr r2, =REG_NR22
+	b _081DEB28
+	.pool
+_081DEB00:
+	ldr r0, =REG_NR30
+	str r0, [sp, 0x8]
+	ldr r7, =REG_NR31
+	ldr r2, =REG_NR32
+	str r2, [sp, 0xC]
+	adds r0, 0x4
+	str r0, [sp, 0x10]
+	adds r2, 0x2
+	b _081DEB30
+	.pool
+_081DEB20:
+	ldr r0, =REG_NR30 + 1
+	str r0, [sp, 0x8]
+	ldr r7, =REG_NR41
+	ldr r2, =REG_NR42
+_081DEB28:
+	str r2, [sp, 0xC]
+	adds r0, 0xB
+	str r0, [sp, 0x10]
+	adds r2, 0x4
+_081DEB30:
+	str r2, [sp, 0x14]
+	ldr r0, [sp, 0x4]
+	ldrb r0, [r0, 0xA]
+	str r0, [sp]
+	ldr r2, [sp, 0xC]
+	ldrb r0, [r2]
+	mov r8, r0
+	adds r2, r1, 0
+	movs r0, 0x80
+	ands r0, r2
+	cmp r0, 0
+	beq _081DEC26
+	movs r3, 0x40
+	adds r0, r3, 0
+	ands r0, r2
+	lsls r0, 24
+	lsrs r5, r0, 24
+	adds r0, r6, 0x1
+	mov r10, r0
+	movs r1, 0x40
+	adds r1, r4
+	mov r9, r1
+	cmp r5, 0
+	bne _081DEC4A
+	movs r0, 0x3
+	strb r0, [r4]
+	strb r0, [r4, 0x1D]
+	adds r0, r4, 0
+	str r3, [sp, 0x18]
+	bl CgbModVol
+	ldr r3, [sp, 0x18]
+	cmp r6, 0x2
+	beq _081DEB98
+	cmp r6, 0x2
+	bgt _081DEB8C
+	cmp r6, 0x1
+	beq _081DEB92
+	b _081DEBEC
+	.pool
+_081DEB8C:
+	cmp r6, 0x3
+	beq _081DEBA4
+	b _081DEBEC
+_081DEB92:
+	ldrb r0, [r4, 0x1F]
+	ldr r2, [sp, 0x8]
+	strb r0, [r2]
+_081DEB98:
+	ldr r0, [r4, 0x24]
+	lsls r0, 6
+	ldrb r1, [r4, 0x1E]
+	adds r0, r1, r0
+	strb r0, [r7]
+	b _081DEBF8
+_081DEBA4:
+	ldr r1, [r4, 0x24]
+	ldr r0, [r4, 0x28]
+	cmp r1, r0
+	beq _081DEBCC
+	ldr r2, [sp, 0x8]
+	strb r3, [r2]
+	ldr r1, =REG_WAVE_RAM
+	ldr r2, [r4, 0x24]
+	ldr r0, [r2]
+	str r0, [r1]
+	adds r1, 0x4
+	ldr r0, [r2, 0x4]
+	str r0, [r1]
+	adds r1, 0x4
+	ldr r0, [r2, 0x8]
+	str r0, [r1]
+	adds r1, 0x4
+	ldr r0, [r2, 0xC]
+	str r0, [r1]
+	str r2, [r4, 0x28]
+_081DEBCC:
+	ldr r0, [sp, 0x8]
+	strb r5, [r0]
+	ldrb r0, [r4, 0x1E]
+	strb r0, [r7]
+	ldrb r0, [r4, 0x1E]
+	cmp r0, 0
+	beq _081DEBE4
+	movs r0, 0xC0
+	b _081DEC06
+	.pool
+_081DEBE4:
+	movs r1, 0x80
+	negs r1, r1
+	strb r1, [r4, 0x1A]
+	b _081DEC08
+_081DEBEC:
+	ldrb r0, [r4, 0x1E]
+	strb r0, [r7]
+	ldr r0, [r4, 0x24]
+	lsls r0, 3
+	ldr r2, [sp, 0x10]
+	strb r0, [r2]
+_081DEBF8:
+	ldrb r0, [r4, 0x4]
+	adds r0, 0x8
+	mov r8, r0
+	ldrb r0, [r4, 0x1E]
+	cmp r0, 0
+	beq _081DEC06
+	movs r0, 0x40
+_081DEC06:
+	strb r0, [r4, 0x1A]
+_081DEC08:
+	ldrb r1, [r4, 0x4]
+	movs r2, 0
+	strb r1, [r4, 0xB]
+	movs r0, 0xFF
+	ands r0, r1
+	adds r1, r6, 0x1
+	mov r10, r1
+	movs r1, 0x40
+	adds r1, r4
+	mov r9, r1
+	cmp r0, 0
+	bne _081DEC22
+	b _081DED5E
+_081DEC22:
+	strb r2, [r4, 0x9]
+	b _081DED8C
+_081DEC26:
+	movs r0, 0x4
+	ands r0, r2
+	cmp r0, 0
+	beq _081DEC58
+	ldrb r0, [r4, 0xD]
+	subs r0, 0x1
+	strb r0, [r4, 0xD]
+	movs r2, 0xFF
+	ands r0, r2
+	lsls r0, 24
+	adds r1, r6, 0x1
+	mov r10, r1
+	movs r2, 0x40
+	adds r2, r4
+	mov r9, r2
+	cmp r0, 0
+	ble _081DEC4A
+	b _081DED9E
+_081DEC4A:
+	lsls r0, r6, 24
+	lsrs r0, 24
+	bl CgbOscOff
+	movs r0, 0
+	strb r0, [r4]
+	b _081DEE9C
+_081DEC58:
+	movs r0, 0x40
+	ands r0, r1
+	adds r2, r6, 0x1
+	mov r10, r2
+	movs r2, 0x40
+	adds r2, r4
+	mov r9, r2
+	cmp r0, 0
+	beq _081DEC98
+	movs r0, 0x3
+	ands r0, r1
+	cmp r0, 0
+	beq _081DEC98
+	movs r0, 0xFC
+	ands r0, r1
+	movs r2, 0
+	strb r0, [r4]
+	ldrb r1, [r4, 0x7]
+	strb r1, [r4, 0xB]
+	movs r0, 0xFF
+	ands r0, r1
+	cmp r0, 0
+	beq _081DECCA
+	movs r0, 0x1
+	ldrb r1, [r4, 0x1D]
+	orrs r0, r1
+	strb r0, [r4, 0x1D]
+	cmp r6, 0x3
+	beq _081DED8C
+	ldrb r2, [r4, 0x7]
+	mov r8, r2
+	b _081DED8C
+_081DEC98:
+	ldrb r0, [r4, 0xB]
+	cmp r0, 0
+	bne _081DED8C
+	cmp r6, 0x3
+	bne _081DECAA
+	movs r0, 0x1
+	ldrb r1, [r4, 0x1D]
+	orrs r0, r1
+	strb r0, [r4, 0x1D]
+_081DECAA:
+	adds r0, r4, 0
+	bl CgbModVol
+	movs r0, 0x3
+	ldrb r2, [r4]
+	ands r0, r2
+	cmp r0, 0
+	bne _081DECFE
+	ldrb r0, [r4, 0x9]
+	subs r0, 0x1
+	strb r0, [r4, 0x9]
+	movs r1, 0xFF
+	ands r0, r1
+	lsls r0, 24
+	cmp r0, 0
+	bgt _081DECFA
+_081DECCA:
+	ldrb r2, [r4, 0xC]
+	ldrb r1, [r4, 0xA]
+	adds r0, r2, 0
+	muls r0, r1
+	adds r0, 0xFF
+	asrs r0, 8
+	movs r1, 0
+	strb r0, [r4, 0x9]
+	lsls r0, 24
+	cmp r0, 0
+	beq _081DEC4A
+	movs r0, 0x4
+	ldrb r2, [r4]
+	orrs r0, r2
+	strb r0, [r4]
+	movs r0, 0x1
+	ldrb r1, [r4, 0x1D]
+	orrs r0, r1
+	strb r0, [r4, 0x1D]
+	cmp r6, 0x3
+	beq _081DED9E
+	movs r2, 0x8
+	mov r8, r2
+	b _081DED9E
+_081DECFA:
+	ldrb r0, [r4, 0x7]
+	b _081DED8A
+_081DECFE:
+	cmp r0, 0x1
+	bne _081DED0A
+_081DED02:
+	ldrb r0, [r4, 0x19]
+	strb r0, [r4, 0x9]
+	movs r0, 0x7
+	b _081DED8A
+_081DED0A:
+	cmp r0, 0x2
+	bne _081DED4E
+	ldrb r0, [r4, 0x9]
+	subs r0, 0x1
+	strb r0, [r4, 0x9]
+	movs r1, 0xFF
+	ands r0, r1
+	lsls r0, 24
+	ldrb r2, [r4, 0x19]
+	lsls r1, r2, 24
+	cmp r0, r1
+	bgt _081DED4A
+_081DED22:
+	ldrb r0, [r4, 0x6]
+	cmp r0, 0
+	bne _081DED32
+	movs r0, 0xFC
+	ldrb r1, [r4]
+	ands r0, r1
+	strb r0, [r4]
+	b _081DECCA
+_081DED32:
+	ldrb r0, [r4]
+	subs r0, 0x1
+	strb r0, [r4]
+	movs r0, 0x1
+	ldrb r2, [r4, 0x1D]
+	orrs r0, r2
+	strb r0, [r4, 0x1D]
+	cmp r6, 0x3
+	beq _081DED02
+	movs r0, 0x8
+	mov r8, r0
+	b _081DED02
+_081DED4A:
+	ldrb r0, [r4, 0x5]
+	b _081DED8A
+_081DED4E:
+	ldrb r0, [r4, 0x9]
+	adds r0, 0x1
+	strb r0, [r4, 0x9]
+	movs r1, 0xFF
+	ands r0, r1
+	ldrb r2, [r4, 0xA]
+	cmp r0, r2
+	bcc _081DED88
+_081DED5E:
+	ldrb r0, [r4]
+	subs r0, 0x1
+	movs r2, 0
+	strb r0, [r4]
+	ldrb r1, [r4, 0x5]
+	strb r1, [r4, 0xB]
+	movs r0, 0xFF
+	ands r0, r1
+	cmp r0, 0
+	beq _081DED22
+	movs r0, 0x1
+	ldrb r1, [r4, 0x1D]
+	orrs r0, r1
+	strb r0, [r4, 0x1D]
+	ldrb r0, [r4, 0xA]
+	strb r0, [r4, 0x9]
+	cmp r6, 0x3
+	beq _081DED8C
+	ldrb r2, [r4, 0x5]
+	mov r8, r2
+	b _081DED8C
+_081DED88:
+	ldrb r0, [r4, 0x4]
+_081DED8A:
+	strb r0, [r4, 0xB]
+_081DED8C:
+	ldrb r0, [r4, 0xB]
+	subs r0, 0x1
+	strb r0, [r4, 0xB]
+	ldr r0, [sp]
+	cmp r0, 0
+	bne _081DED9E
+	subs r0, 0x1
+	str r0, [sp]
+	b _081DEC98
+_081DED9E:
+	movs r0, 0x2
+	ldrb r1, [r4, 0x1D]
+	ands r0, r1
+	cmp r0, 0
+	beq _081DEE16
+	cmp r6, 0x3
+	bgt _081DEDDE
+	movs r0, 0x8
+	ldrb r2, [r4, 0x1]
+	ands r0, r2
+	cmp r0, 0
+	beq _081DEDDE
+	ldr r0, =REG_SOUNDBIAS + 1
+	ldrb r0, [r0]
+	cmp r0, 0x3F
+	bgt _081DEDD0
+	ldr r0, [r4, 0x20]
+	adds r0, 0x2
+	ldr r1, =0x000007fc
+	b _081DEDDA
+	.pool
+_081DEDD0:
+	cmp r0, 0x7F
+	bgt _081DEDDE
+	ldr r0, [r4, 0x20]
+	adds r0, 0x1
+	ldr r1, =0x000007fe
+_081DEDDA:
+	ands r0, r1
+	str r0, [r4, 0x20]
+_081DEDDE:
+	cmp r6, 0x4
+	beq _081DEDF0
+	ldr r0, [r4, 0x20]
+	ldr r1, [sp, 0x10]
+	strb r0, [r1]
+	b _081DEDFE
+	.pool
+_081DEDF0:
+	ldr r2, [sp, 0x10]
+	ldrb r0, [r2]
+	movs r1, 0x8
+	ands r1, r0
+	ldr r0, [r4, 0x20]
+	orrs r0, r1
+	strb r0, [r2]
+_081DEDFE:
+	movs r0, 0xC0
+	ldrb r1, [r4, 0x1A]
+	ands r0, r1
+	adds r1, r4, 0
+	adds r1, 0x21
+	ldrb r1, [r1]
+	adds r0, r1, r0
+	strb r0, [r4, 0x1A]
+	movs r2, 0xFF
+	ands r0, r2
+	ldr r1, [sp, 0x14]
+	strb r0, [r1]
+_081DEE16:
+	movs r0, 0x1
+	ldrb r2, [r4, 0x1D]
+	ands r0, r2
+	cmp r0, 0
+	beq _081DEE9C
+	ldr r1, =REG_NR51
+	ldrb r0, [r1]
+	ldrb r2, [r4, 0x1C]
+	bics r0, r2
+	ldrb r2, [r4, 0x1B]
+	orrs r0, r2
+	strb r0, [r1]
+	cmp r6, 0x3
+	bne _081DEE68
+	ldr r0, =gCgb3Vol
+	ldrb r1, [r4, 0x9]
+	adds r0, r1, r0
+	ldrb r0, [r0]
+	ldr r2, [sp, 0xC]
+	strb r0, [r2]
+	movs r1, 0x80
+	adds r0, r1, 0
+	ldrb r2, [r4, 0x1A]
+	ands r0, r2
+	cmp r0, 0
+	beq _081DEE9C
+	ldr r0, [sp, 0x8]
+	strb r1, [r0]
+	ldrb r0, [r4, 0x1A]
+	ldr r1, [sp, 0x14]
+	strb r0, [r1]
+	movs r0, 0x7F
+	ldrb r2, [r4, 0x1A]
+	ands r0, r2
+	strb r0, [r4, 0x1A]
+	b _081DEE9C
+	.pool
+_081DEE68:
+	movs r0, 0xF
+	mov r1, r8
+	ands r1, r0
+	mov r8, r1
+	ldrb r2, [r4, 0x9]
+	lsls r0, r2, 4
+	add r0, r8
+	ldr r1, [sp, 0xC]
+	strb r0, [r1]
+	movs r2, 0x80
+	ldrb r0, [r4, 0x1A]
+	orrs r0, r2
+	ldr r1, [sp, 0x14]
+	strb r0, [r1]
+	cmp r6, 0x1
+	bne _081DEE9C
+	ldr r0, [sp, 0x8]
+	ldrb r1, [r0]
+	movs r0, 0x8
+	ands r0, r1
+	cmp r0, 0
+	bne _081DEE9C
+	ldrb r0, [r4, 0x1A]
+	orrs r0, r2
+	ldr r1, [sp, 0x14]
+	strb r0, [r1]
+_081DEE9C:
+	movs r0, 0
+	strb r0, [r4, 0x1D]
+_081DEEA0:
+	mov r6, r10
+	mov r4, r9
+	cmp r6, 0x4
+	bgt _081DEEAA
+	b _081DEAA0
+_081DEEAA:
+	add sp, 0x1C
+	pop {r3-r5}
+	mov r8, r3
+	mov r9, r4
+	mov r10, r5
+	pop {r4-r7}
+	pop {r0}
+	bx r0
+	thumb_func_end CgbSound
+
+	.align 2, 0 @ Don't pad with nop.
diff --git a/asm/rom1.s b/asm/rom1.s
index ab78fa2eb..3c9838721 100644
--- a/asm/rom1.s
+++ b/asm/rom1.s
@@ -417,7 +417,7 @@ _0800057E:
 	ldrh r4, [r5]
 	movs r6, 0
 	strh r6, [r5]
-	bl SoundVSync_rev01
+	bl m4aSoundVSync
 	strh r4, [r5]
 	ldr r4, _080005DC
 	ldr r0, [r4, 0x20]
@@ -579,7 +579,7 @@ DoSoftReset: @ 80006B4
 	ldr r1, _08000710
 	movs r0, 0
 	strh r0, [r1]
-	bl SoundVSyncOff_rev01
+	bl m4aSoundVSyncOff
 	bl remove_some_task
 	ldr r1, _08000714
 	ldrh r2, [r1, 0xA]
diff --git a/asm/rom3.s b/asm/rom3.s
index f670af62d..ecba1f0b9 100644
--- a/asm/rom3.s
+++ b/asm/rom3.s
@@ -71034,7 +71034,7 @@ _0802D47C:
 	ldr r1, _0802D4E4
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _0802D488:
 	ldr r7, _0802D4E8
 	ldr r4, _0802D4EC
@@ -71374,7 +71374,7 @@ sub_802D730: @ 802D730
 	ldr r1, _0802D78C
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	ldr r2, _0802D790
 	ldrb r1, [r4]
 	lsls r0, r1, 1
@@ -71508,7 +71508,7 @@ c3_0802FDF4: @ 802D86C
 	ldr r1, _0802D898
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	adds r0, r4, 0
 	bl DestroyTask
 _0802D88E:
@@ -79191,9 +79191,9 @@ mplay_80342A4: @ 8031724
 	cmp r0, 0x1D
 	bls _08031768
 	ldr r0, _08031774
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r0, _08031778
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 _08031764:
 	cmp r5, 0
 	beq _0803177C
@@ -82009,7 +82009,7 @@ _08032DE4:
 	ldr r1, _08032E18
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _08032DF0:
 	ldr r2, _08032E1C
 	ldrb r1, [r2]
@@ -91138,7 +91138,7 @@ _080377F8:
 	ldr r1, _0803782C
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _08037804:
 	ldr r2, _08037830
 	ldrb r1, [r2]
@@ -122467,7 +122467,7 @@ _08046D5A:
 	cmp r0, 0
 	beq _08046DAE
 	ldr r0, _08046DA0
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	b _08046DAE
 	.align 2, 0
 _08046D90: .4byte 0x02024a6a
@@ -122479,7 +122479,7 @@ _08046DA4:
 	ldr r0, _08046DC8
 	ldr r1, _08046DCC
 	movs r2, 0x80
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _08046DAE:
 	bl battle_type_is_double
 	lsls r0, 24
@@ -136649,7 +136649,7 @@ sub_804E290: @ 804E290
 	subs r2, 0x80
 	lsls r2, 17
 	asrs r2, 16
-	bl MPlayPitchControl
+	bl m4aMPlayPitchControl
 	pop {r0}
 	bx r0
 	.align 2, 0
@@ -140194,7 +140194,7 @@ _0804FFE4:
 	lsls r1, 16
 	lsrs r1, 16
 	ldr r0, _08050030
-	bl MPlayTempoControl
+	bl m4aMPlayTempoControl
 	b _0805003E
 	.align 2, 0
 _08050018: .4byte 0x00002345
@@ -140208,7 +140208,7 @@ _08050034:
 	ldr r0, _08050098
 	movs r1, 0x80
 	lsls r1, 1
-	bl MPlayTempoControl
+	bl m4aMPlayTempoControl
 _0805003E:
 	ldr r1, [sp]
 	adds r1, 0x2
@@ -141475,7 +141475,7 @@ _080509B4:
 	ldr r0, _080509C8
 	movs r1, 0x80
 	lsls r1, 1
-	bl MPlayTempoControl
+	bl m4aMPlayTempoControl
 	movs r4, 0
 	b _080509E4
 	.align 2, 0
@@ -141537,7 +141537,7 @@ _08050A32:
 	movs r1, 0
 	strb r1, [r0]
 	ldr r0, _08050A48
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 _08050A40:
 	bl sub_804E290
 	b _08050CB6
diff --git a/asm/rom4.s b/asm/rom4.s
index 1888b7858..ec32eece4 100644
--- a/asm/rom4.s
+++ b/asm/rom4.s
@@ -73977,7 +73977,7 @@ pause_music_for_sound_maybe: @ 8074E38
 	lsls r4, 24
 	lsrs r4, 24
 	ldr r0, _08074E60
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r0, _08074E64
 	lsls r4, 2
 	adds r4, r0
@@ -74163,7 +74163,7 @@ _08074F80:
 	ldr r1, _08074FB4
 	adds r0, r4, 0
 	movs r2, 0
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	adds r0, r5, 0
 	bl m4aSongNumStop
 	adds r0, r4, 0
@@ -74274,7 +74274,7 @@ cry_related: @ 8075044
 	ldr r0, _08075084
 	ldr r1, _08075088
 	movs r2, 0x55
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	lsls r4, 24
 	asrs r4, 24
 	movs r0, 0
@@ -74343,7 +74343,7 @@ _080750DA:
 	ldr r0, _08075108
 	ldr r1, _0807510C
 	movs r2, 0x55
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	lsls r1, r5, 24
 	asrs r1, 24
 	str r4, [sp]
@@ -74398,7 +74398,7 @@ _0807513E:
 	ldr r0, _08075170
 	ldr r1, _08075174
 	movs r2, 0x55
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _08075154:
 	lsls r1, r5, 24
 	asrs r1, 24
@@ -74431,7 +74431,7 @@ sub_8075178: @ 8075178
 	ldr r0, _080751B4
 	ldr r1, _080751B8
 	movs r2, 0x55
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	str r4, [sp]
 	adds r0, r5, 0
 	movs r1, 0
@@ -74695,7 +74695,7 @@ sub_8075398: @ 8075398
 	push {lr}
 	ldr r0, _080753AC
 	ldr r0, [r0]
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	bl sub_8000724
 	pop {r0}
 	bx r0
@@ -74708,7 +74708,7 @@ sub_80753B0: @ 80753B0
 	push {lr}
 	ldr r0, _080753C0
 	ldr r0, [r0]
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	pop {r0}
 	bx r0
 	.align 2, 0
@@ -74778,7 +74778,7 @@ _08075420:
 	ldr r1, _0807544C
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	adds r0, r4, 0
 	bl DestroyTask
 _0807543E:
@@ -74864,11 +74864,11 @@ audio_play_and_stuff: @ 80754A4
 	adds r0, r6, 0
 	adds r1, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	mov r0, r8
 	adds r1, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	pop {r3}
 	mov r8, r3
 	pop {r4-r6}
@@ -74897,7 +74897,7 @@ sub_80754F8: @ 80754F8
 	asrs r4, 24
 	adds r0, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	pop {r4,r5}
 	pop {r0}
 	bx r0
@@ -74923,7 +74923,7 @@ sub_807552C: @ 807552C
 	asrs r4, 24
 	adds r0, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	pop {r4,r5}
 	pop {r0}
 	bx r0
@@ -74942,11 +74942,11 @@ sub_8075560: @ 8075560
 	asrs r4, 24
 	adds r1, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	ldr r0, _0807558C
 	adds r1, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	pop {r4,r5}
 	pop {r0}
 	bx r0
@@ -75341,7 +75341,7 @@ _08075896:
 	bne _08075894
 	ldr r0, _080758D4
 	movs r2, 0x80
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _080758AE:
 	ldr r0, _080758D8
 	movs r1, 0
@@ -75936,9 +75936,9 @@ _08075D14: .4byte 0x03004af0
 _08075D18: .4byte 0x0202f7b0
 _08075D1C:
 	ldr r0, _08075D98
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r0, _08075D9C
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 _08075D28:
 	ldr r1, _08075DA0
 	movs r0, 0
@@ -75976,7 +75976,7 @@ _08075D5A:
 	ldr r1, _08075DA4
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	bl sub_8076BE0
 	lsls r0, 24
 	cmp r0, 0
@@ -79235,9 +79235,9 @@ ma20_wait_for_something: @ 8077684
 	cmp r0, 0x5A
 	bls _080776D2
 	ldr r0, _080776C4
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r0, _080776C8
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	strh r5, [r4]
 	b _080776F6
 	.align 2, 0
@@ -79746,9 +79746,9 @@ _08077A90: .4byte 0x02020004
 ma2F_stop_music: @ 8077A94
 	push {lr}
 	ldr r0, _08077AB0
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r0, _08077AB4
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r1, _08077AB8
 	ldr r0, [r1]
 	adds r0, 0x1
diff --git a/asm/rom5.s b/asm/rom5.s
index 104b380ec..faa088118 100644
--- a/asm/rom5.s
+++ b/asm/rom5.s
@@ -36061,7 +36061,7 @@ _0808C4C4:
 	ldr r0, _0808C538
 	ldr r1, _0808C53C
 	movs r2, 0x80
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _0808C50C:
 	add sp, 0x8
 	pop {r3}
@@ -36964,7 +36964,7 @@ _0808CC7A:
 	ldr r1, _0808CCC0
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _0808CC9C:
 	pop {r4-r6}
 	pop {r0}
@@ -42677,7 +42677,7 @@ _0808FABC:
 	b _0808FDDC
 _0808FACA:
 	ldr r0, _0808FB0C
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	ldr r5, _0808FB10
 	ldr r0, [r5]
 	ldr r3, _0808FB14
@@ -71872,7 +71872,7 @@ sub_809E13C: @ 809E13C
 	ldr r1, _0809E198
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	ldr r0, [r4, 0x4]
 	bl SetMainCallback2
 	adds r0, r5, 0
@@ -108206,7 +108206,7 @@ _080AFDA2:
 	lsls r2, r3, 24
 	asrs r2, 16
 	adds r0, r4, 0
-	bl MPlayPitchControl
+	bl m4aMPlayPitchControl
 	b _080AFE02
 	.align 2, 0
 _080AFDE8: .4byte 0x02038696
@@ -256921,12 +256921,12 @@ _080F80F2:
 	ldrh r2, [r6, 0x6]
 	adds r0, r4, 0
 	adds r1, r5, 0
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	movs r0, 0x8
 	ldrsh r2, [r6, r0]
 	adds r0, r4, 0
 	adds r1, r5, 0
-	bl MPlayPitchControl
+	bl m4aMPlayPitchControl
 	ldrh r0, [r6, 0xA]
 	adds r0, 0x1
 	strh r0, [r6, 0xA]
@@ -256957,7 +256957,7 @@ _080F8124:
 	ldrh r2, [r6, 0x6]
 	adds r0, r4, 0
 	adds r1, r5, 0
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	movs r2, 0x80
 	lsls r2, 2
 	adds r0, r2, 0
@@ -256968,14 +256968,14 @@ _080F8124:
 	ldrsh r2, [r6, r0]
 	adds r0, r4, 0
 	adds r1, r5, 0
-	bl MPlayPitchControl
+	bl m4aMPlayPitchControl
 	b _080F817A
 	.align 2, 0
 _080F8168: .4byte 0x03007400
 _080F816C: .4byte 0x0000ffff
 _080F8170:
 	ldr r0, _080F8180
-	bl MPlayStop_rev01
+	bl m4aMPlayStop
 	movs r0, 0xFF
 _080F8178:
 	strb r0, [r6, 0x3]
@@ -323874,13 +323874,13 @@ _08118790:
 	lsls r2, 24
 	asrs r2, 24
 	adds r1, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	ldr r0, _08118830
 	ldrh r2, [r6, 0x24]
 	lsls r2, 24
 	asrs r2, 24
 	adds r1, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 _08118818:
 	pop {r3}
 	mov r8, r3
@@ -326388,11 +326388,11 @@ sub_8119BCC: @ 8119BCC
 	asrs r4, 24
 	adds r1, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	ldr r0, _08119C58
 	adds r1, r5, 0
 	adds r2, r4, 0
-	bl MPlayPanpotControl
+	bl m4aMPlayPanpotControl
 	b _08119CF6
 	.align 2, 0
 _08119C44: .4byte gUnknown_083FA64A
@@ -410682,7 +410682,7 @@ _08142E98:
 	ldr r1, _08142EBC
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _08142EB2:
 	ldr r0, _08142EC0
 	str r0, [r4]
@@ -410705,7 +410705,7 @@ _08142EC4:
 	ldr r1, _08142EFC
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 _08142EE6:
 	ldr r0, _08142F00
 	lsls r1, r6, 2
@@ -420608,7 +420608,7 @@ sub_8147F08: @ 8147F08
 	ldr r1, _08147F44
 	movs r2, 0x80
 	lsls r2, 1
-	bl MPlayVolumeControl
+	bl m4aMPlayVolumeControl
 	ldr r0, _08147F48
 	ldr r0, [r0, 0x8]
 	bl SetMainCallback2
diff --git a/constants/gba_constants.s b/constants/gba_constants.s
index 46dfdcc2f..accd16007 100644
--- a/constants/gba_constants.s
+++ b/constants/gba_constants.s
@@ -15,7 +15,8 @@
 	.set IWRAM_START, 0x03000000
 	.set IWRAM_END,   IWRAM_START + 0x8000
 
-	.set INTR_VECTOR, IWRAM_END - 0x4
+	.set SOUND_INFO_PTR, IWRAM_END - 0x10
+	.set INTR_VECTOR,    IWRAM_END - 0x4
 
 	.set INTR_FLAG_VBLANK,  1 << 0
 	.set INTR_FLAG_HBLANK,  1 << 1
@@ -32,6 +33,9 @@
 	.set INTR_FLAG_KEYPAD,  1 << 12
 	.set INTR_FLAG_GAMEPAK, 1 << 13
 
+	.set VCOUNT_VBLANK, 160
+	.set TOTAL_SCANLINES, 228
+
 	.set REG_BASE, 0x4000000 @ I/O register base address
 
 @ I/O register offsets
@@ -79,22 +83,43 @@
 
 	.set OFFSET_REG_SOUND1CNT,   0x60
 	.set OFFSET_REG_SOUND1CNT_L, 0x60
+	.set OFFSET_REG_NR10,        0x60
 	.set OFFSET_REG_SOUND1CNT_H, 0x62
+	.set OFFSET_REG_NR11,        0x62
+	.set OFFSET_REG_NR12,        0x63
 	.set OFFSET_REG_SOUND1CNT_X, 0x64
+	.set OFFSET_REG_NR13,        0x64
+	.set OFFSET_REG_NR14,        0x65
 	.set OFFSET_REG_SOUND2CNT,   0x68
 	.set OFFSET_REG_SOUND2CNT_L, 0x68
+	.set OFFSET_REG_NR21,        0x68
+	.set OFFSET_REG_NR22,        0x69
 	.set OFFSET_REG_SOUND2CNT_H, 0x6c
+	.set OFFSET_REG_NR23,        0x6c
+	.set OFFSET_REG_NR24,        0x6d
 	.set OFFSET_REG_SOUND3CNT,   0x70
 	.set OFFSET_REG_SOUND3CNT_L, 0x70
+	.set OFFSET_REG_NR30,        0x70
 	.set OFFSET_REG_SOUND3CNT_H, 0x72
+	.set OFFSET_REG_NR31,        0x72
+	.set OFFSET_REG_NR32,        0x73
 	.set OFFSET_REG_SOUND3CNT_X, 0x74
+	.set OFFSET_REG_NR33,        0x74
+	.set OFFSET_REG_NR34,        0x75
 	.set OFFSET_REG_SOUND4CNT,   0x78
 	.set OFFSET_REG_SOUND4CNT_L, 0x78
+	.set OFFSET_REG_NR41,        0x78
+	.set OFFSET_REG_NR42,        0x79
 	.set OFFSET_REG_SOUND4CNT_H, 0x7c
+	.set OFFSET_REG_NR43,        0x7c
+	.set OFFSET_REG_NR44,        0x7d
 	.set OFFSET_REG_SOUNDCNT,    0x80
 	.set OFFSET_REG_SOUNDCNT_L,  0x80
+	.set OFFSET_REG_NR50,        0x80
+	.set OFFSET_REG_NR51,        0x81
 	.set OFFSET_REG_SOUNDCNT_H,  0x82
 	.set OFFSET_REG_SOUNDCNT_X,  0x84
+	.set OFFSET_REG_NR52,        0x84
 	.set OFFSET_REG_SOUNDBIAS,   0x88
 	.set OFFSET_REG_WAVE_RAM,    0x90
 	.set OFFSET_REG_WAVE_RAM0,   0x90
@@ -246,22 +271,43 @@
 
 	.set REG_SOUND1CNT,   REG_BASE + OFFSET_REG_SOUND1CNT
 	.set REG_SOUND1CNT_L, REG_BASE + OFFSET_REG_SOUND1CNT_L
+	.set REG_NR10,        REG_BASE + OFFSET_REG_NR10
 	.set REG_SOUND1CNT_H, REG_BASE + OFFSET_REG_SOUND1CNT_H
+	.set REG_NR11,        REG_BASE + OFFSET_REG_NR11
+	.set REG_NR12,        REG_BASE + OFFSET_REG_NR12
 	.set REG_SOUND1CNT_X, REG_BASE + OFFSET_REG_SOUND1CNT_X
+	.set REG_NR13,        REG_BASE + OFFSET_REG_NR13
+	.set REG_NR14,        REG_BASE + OFFSET_REG_NR14
 	.set REG_SOUND2CNT,   REG_BASE + OFFSET_REG_SOUND2CNT
 	.set REG_SOUND2CNT_L, REG_BASE + OFFSET_REG_SOUND2CNT_L
+	.set REG_NR21,        REG_BASE + OFFSET_REG_NR21
+	.set REG_NR22,        REG_BASE + OFFSET_REG_NR22
 	.set REG_SOUND2CNT_H, REG_BASE + OFFSET_REG_SOUND2CNT_H
+	.set REG_NR23,        REG_BASE + OFFSET_REG_NR23
+	.set REG_NR24,        REG_BASE + OFFSET_REG_NR24
 	.set REG_SOUND3CNT,   REG_BASE + OFFSET_REG_SOUND3CNT
 	.set REG_SOUND3CNT_L, REG_BASE + OFFSET_REG_SOUND3CNT_L
+	.set REG_NR30,        REG_BASE + OFFSET_REG_NR30
 	.set REG_SOUND3CNT_H, REG_BASE + OFFSET_REG_SOUND3CNT_H
+	.set REG_NR31,        REG_BASE + OFFSET_REG_NR31
+	.set REG_NR32,        REG_BASE + OFFSET_REG_NR32
 	.set REG_SOUND3CNT_X, REG_BASE + OFFSET_REG_SOUND3CNT_X
+	.set REG_NR33,        REG_BASE + OFFSET_REG_NR33
+	.set REG_NR34,        REG_BASE + OFFSET_REG_NR34
 	.set REG_SOUND4CNT,   REG_BASE + OFFSET_REG_SOUND4CNT
 	.set REG_SOUND4CNT_L, REG_BASE + OFFSET_REG_SOUND4CNT_L
+	.set REG_NR41,        REG_BASE + OFFSET_REG_NR41
+	.set REG_NR42,        REG_BASE + OFFSET_REG_NR42
 	.set REG_SOUND4CNT_H, REG_BASE + OFFSET_REG_SOUND4CNT_H
+	.set REG_NR43,        REG_BASE + OFFSET_REG_NR43
+	.set REG_NR44,        REG_BASE + OFFSET_REG_NR44
 	.set REG_SOUNDCNT,    REG_BASE + OFFSET_REG_SOUNDCNT
 	.set REG_SOUNDCNT_L,  REG_BASE + OFFSET_REG_SOUNDCNT_L
+	.set REG_NR50,        REG_BASE + OFFSET_REG_NR50
+	.set REG_NR51,        REG_BASE + OFFSET_REG_NR51
 	.set REG_SOUNDCNT_H,  REG_BASE + OFFSET_REG_SOUNDCNT_H
 	.set REG_SOUNDCNT_X,  REG_BASE + OFFSET_REG_SOUNDCNT_X
+	.set REG_NR52,        REG_BASE + OFFSET_REG_NR52
 	.set REG_SOUNDBIAS,   REG_BASE + OFFSET_REG_SOUNDBIAS
 	.set REG_WAVE_RAM,    REG_BASE + OFFSET_REG_WAVE_RAM
 	.set REG_WAVE_RAM0,   REG_BASE + OFFSET_REG_WAVE_RAM0
@@ -368,6 +414,26 @@
 
 	.set REG_WAITCNT,     REG_BASE + OFFSET_REG_WAITCNT
 
+@ DMA register constants
+
+	.set DMA_DEST_INC,      0x0000
+	.set DMA_DEST_DEC,      0x0020
+	.set DMA_DEST_FIXED,    0x0040
+	.set DMA_DEST_RELOAD,   0x0060
+	.set DMA_SRC_INC,       0x0000
+	.set DMA_SRC_DEC,       0x0080
+	.set DMA_SRC_FIXED,     0x0100
+	.set DMA_REPEAT,        0x0200
+	.set DMA_16BIT,         0x0000
+	.set DMA_32BIT,         0x0400
+	.set DMA_DREQ_ON,       0x0800
+	.set DMA_START_NOW,     0x0000
+	.set DMA_START_VBLANK,  0x1000
+	.set DMA_START_HBLANK,  0x2000
+	.set DMA_START_SPECIAL, 0x3000
+	.set DMA_INTR_ENABLE,   0x4000
+	.set DMA_ENABLE,        0x8000
+
 @ OAM attribute constants
 
 	.set OAM_OBJ_NORMAL,         0x00000000
diff --git a/constants/m4a_constants.s b/constants/m4a_constants.s
new file mode 100644
index 000000000..4b05bc63d
--- /dev/null
+++ b/constants/m4a_constants.s
@@ -0,0 +1,127 @@
+	.equiv ID_NUMBER, 0x68736d53
+
+	.equiv PCM_DMA_BUF_SIZE, 1584
+
+	.macro struct_begin
+	.struct 0
+	.endm
+
+	.macro struct_field name, size
+\name:
+	.struct \name + \size
+	.endm
+
+	struct_begin
+	struct_field o_SoundInfo_ident, 4
+	struct_field o_SoundInfo_pcmDmaCounter, 1
+	struct_field o_SoundInfo_reverb, 1
+	struct_field o_SoundInfo_maxChans, 1
+	struct_field o_SoundInfo_masterVolume, 1
+	struct_field o_SoundInfo_freq, 1
+	struct_field o_SoundInfo_mode, 1
+	struct_field o_SoundInfo_c15, 1
+	struct_field o_SoundInfo_pcmDmaPeriod, 1
+	struct_field o_SoundInfo_maxLines, 1
+	struct_field o_SoundInfo_gap, 3
+	struct_field o_SoundInfo_pcmSamplesPerVBlank, 4
+	struct_field o_SoundInfo_pcmFreq, 4
+	struct_field o_SoundInfo_divFreq, 4
+	struct_field o_SoundInfo_cgbChans, 4
+	struct_field o_SoundInfo_func, 4
+	struct_field o_SoundInfo_intp, 4
+	struct_field o_SoundInfo_CgbSound, 4
+	struct_field o_SoundInfo_CgbOscOff, 4
+	struct_field o_SoundInfo_MidiKeyToCgbFreq, 4
+	struct_field o_SoundInfo_MPlayJumpTable, 4
+	struct_field o_SoundInfo_plynote, 4
+	struct_field o_SoundInfo_ExtVolPit, 4
+	struct_field o_SoundInfo_gap2, 16
+	struct_field o_SoundInfo_chans, 768
+	struct_field o_SoundInfo_pcmBuffer, PCM_DMA_BUF_SIZE * 2
+	struct_field SoundInfo_size, 0
+
+	struct_begin
+	struct_field o_SoundChannel_status, 1
+	struct_field o_SoundChannel_type, 1
+	struct_field o_SoundChannel_rightVolume, 1
+	struct_field o_SoundChannel_leftVolume, 1
+	struct_field o_SoundChannel_attack, 1
+	struct_field o_SoundChannel_decay, 1
+	struct_field o_SoundChannel_sustain, 1
+	struct_field o_SoundChannel_release, 1
+	struct_field o_SoundChannel_ky, 1
+	struct_field o_SoundChannel_ev, 1
+	struct_field o_SoundChannel_er, 1
+	struct_field o_SoundChannel_el, 1
+	struct_field o_SoundChannel_iev, 1
+	struct_field o_SoundChannel_iel, 1
+	struct_field o_SoundChannel_d1, 1
+	struct_field o_SoundChannel_d2, 1
+	struct_field o_SoundChannel_gt, 1
+	struct_field o_SoundChannel_mk, 1
+	struct_field o_SoundChannel_ve, 1
+	struct_field o_SoundChannel_pr, 1
+	struct_field o_SoundChannel_rp, 1
+	struct_field o_SoundChannel_d3, 3
+	struct_field o_SoundChannel_ct, 4
+	struct_field o_SoundChannel_fw, 4
+	struct_field o_SoundChannel_freq, 4
+	struct_field o_SoundChannel_wav, 4
+	struct_field o_SoundChannel_cp, 4
+	struct_field o_SoundChannel_track, 4
+	struct_field o_SoundChannel_pp, 4
+	struct_field o_SoundChannel_np, 4
+	struct_field o_SoundChannel_d4, 4
+	struct_field o_SoundChannel_xpi, 2
+	struct_field o_SoundChannel_xpc, 2
+	struct_field SoundChannel_size, 0
+
+	struct_begin
+	struct_field o_MusicPlayerTrack_flags, 1
+	struct_field o_MusicPlayerTrack_wai, 1
+	struct_field o_MusicPlayerTrack_patP, 1
+	struct_field o_MusicPlayerTrack_repN, 1
+	struct_field o_MusicPlayerTrack_gat, 1
+	struct_field o_MusicPlayerTrack_key, 1
+	struct_field o_MusicPlayerTrack_vel, 1
+	struct_field o_MusicPlayerTrack_run, 1
+	struct_field o_MusicPlayerTrack_keyM, 1
+	struct_field o_MusicPlayerTrack_pitM, 1
+	struct_field o_MusicPlayerTrack_keyShift, 1
+	struct_field o_MusicPlayerTrack_keyShiftX, 1
+	struct_field o_MusicPlayerTrack_tune, 1
+	struct_field o_MusicPlayerTrack_pitX, 1
+	struct_field o_MusicPlayerTrack_bend, 1
+	struct_field o_MusicPlayerTrack_bendRange, 1
+	struct_field o_MusicPlayerTrack_volMR, 1
+	struct_field o_MusicPlayerTrack_volML, 1
+	struct_field o_MusicPlayerTrack_vol, 1
+	struct_field o_MusicPlayerTrack_volX, 1
+	struct_field o_MusicPlayerTrack_pan, 1
+	struct_field o_MusicPlayerTrack_panX, 1
+	struct_field o_MusicPlayerTrack_modM, 1
+	struct_field o_MusicPlayerTrack_mod, 1
+	struct_field o_MusicPlayerTrack_modT, 1
+	struct_field o_MusicPlayerTrack_lfoSpeed, 1
+	struct_field o_MusicPlayerTrack_lfoSpeedC, 1
+	struct_field o_MusicPlayerTrack_lfoDelay, 1
+	struct_field o_MusicPlayerTrack_lfoDelayC, 1
+	struct_field o_MusicPlayerTrack_priority, 1
+	struct_field o_MusicPlayerTrack_echoVolume, 1
+	struct_field o_MusicPlayerTrack_echoLength, 1
+	struct_field o_MusicPlayerTrack_chan, 4
+	struct_field o_MusicPlayerTrack_ToneData_type, 1
+	struct_field o_MusicPlayerTrack_ToneData_key, 1
+	struct_field o_MusicPlayerTrack_ToneData_length, 1
+	struct_field o_MusicPlayerTrack_ToneData_pan_sweep, 1
+	struct_field o_MusicPlayerTrack_ToneData_wav, 4
+	struct_field o_MusicPlayerTrack_ToneData_attack, 1
+	struct_field o_MusicPlayerTrack_ToneData_decay, 1
+	struct_field o_MusicPlayerTrack_ToneData_sustain, 1
+	struct_field o_MusicPlayerTrack_ToneData_release, 1
+	struct_field o_MusicPlayerTrack_gap, 10
+	struct_field o_MusicPlayerTrack_unk_3A, 2
+	struct_field o_MusicPlayerTrack_unk_3C, 4
+	struct_field o_MusicPlayerTrack_cmdPtr, 4
+	struct_field o_MusicPlayerTrack_patS, 12
+	struct_field MusicPlayerTrack_size, 0
diff --git a/data/data2.s b/data/data2.s
index 987f20017..379106496 100644
--- a/data/data2.s
+++ b/data/data2.s
@@ -10416,91 +10416,3 @@ gUnknown_0842F8E5: @ 842F8E5
 	.global gUnknown_0842F93A
 gUnknown_0842F93A: @ 842F93A
 	.incbin "baserom.gba", 0x0042f93a, 0x2a
-
-	.global gUnknown_0842F964
-gUnknown_0842F964: @ 842F964
-	.incbin "baserom.gba", 0x0042f964, 0x90
-
-	.global gUnknown_0842F9F4
-gUnknown_0842F9F4: @ 842F9F4
-	.incbin "baserom.gba", 0x0042f9f4, 0x10
-
-	.global gUnknown_0842FA04
-gUnknown_0842FA04: @ 842FA04
-	.incbin "baserom.gba", 0x0042fa04, 0xb4
-
-	.global gUnknown_0842FAB8
-gUnknown_0842FAB8: @ 842FAB8
-	.incbin "baserom.gba", 0x0042fab8, 0x30
-
-	.global gUnknown_0842FAE8
-gUnknown_0842FAE8: @ 842FAE8
-	.incbin "baserom.gba", 0x0042fae8, 0x18
-
-	.global gUnknown_0842FB00
-gUnknown_0842FB00: @ 842FB00
-	.incbin "baserom.gba", 0x0042fb00, 0x84
-
-	.global gUnknown_0842FB84
-gUnknown_0842FB84: @ 842FB84
-	.incbin "baserom.gba", 0x0042fb84, 0x18
-
-	.global gUnknown_0842FB9C
-gUnknown_0842FB9C: @ 842FB9C
-	.incbin "baserom.gba", 0x0042fb9c, 0x3c
-
-	.global gUnknown_0842FBD8
-gUnknown_0842FBD8: @ 842FBD8
-	.incbin "baserom.gba", 0x0042fbd8, 0x10
-
-	.global gUnknown_0842FBE8
-gUnknown_0842FBE8: @ 842FBE8
-	.incbin "baserom.gba", 0x0042fbe8, 0x34
-
-	.global gUnknown_0842FC1C
-gUnknown_0842FC1C: @ 842FC1C
-	.incbin "baserom.gba", 0x0042fc1c, 0x34
-
-	.global gUnknown_0842FC50
-gUnknown_0842FC50: @ 842FC50
-	.incbin "baserom.gba", 0x0042fc50, 0x22940
-
-	.global gUnknown_08452590
-gUnknown_08452590: @ 8452590
-	.incbin "baserom.gba", 0x00452590, 0x600
-
-	.global gUnknown_08452B90
-gUnknown_08452B90: @ 8452B90
-	.incbin "baserom.gba", 0x00452b90, 0x600
-
-	.global gUnknown_08453190
-gUnknown_08453190: @ 8453190
-	.incbin "baserom.gba", 0x00453190, 0x600
-
-	.global gUnknown_08453790
-gUnknown_08453790: @ 8453790
-	.incbin "baserom.gba", 0x00453790, 0x30
-
-	.global gUnknown_084537C0
-gUnknown_084537C0: @ 84537C0
-	.incbin "baserom.gba", 0x004537c0, 0x600
-
-	.global gUnknown_08453DC0
-gUnknown_08453DC0: @ 8453DC0
-	.incbin "baserom.gba", 0x00453dc0, 0x600
-
-	.global gUnknown_084543C0
-gUnknown_084543C0: @ 84543C0
-	.incbin "baserom.gba", 0x004543c0, 0x600
-
-	.global gUnknown_084549C0
-gUnknown_084549C0: @ 84549C0
-	.incbin "baserom.gba", 0x004549c0, 0xa9c
-
-	.global gUnknown_0845545C
-gUnknown_0845545C: @ 845545C
-	.incbin "baserom.gba", 0x0045545c, 0x30
-
-	.global gUnknown_0845548C
-gUnknown_0845548C: @ 845548C
-	.incbin "baserom.gba", 0x0045548c, 0x25B29C
diff --git a/data/sound_data.s b/data/sound_data.s
new file mode 100644
index 000000000..d98ac4f50
--- /dev/null
+++ b/data/sound_data.s
@@ -0,0 +1,45 @@
+	.section .rodata
+
+	.global gUnknown_0842FC88
+gUnknown_0842FC88: @ 842FC88
+	.incbin "baserom.gba", 0x0042FC88, 0x22908
+
+	.global gUnknown_08452590
+gUnknown_08452590: @ 8452590
+	.incbin "baserom.gba", 0x00452590, 0x600
+
+	.global gUnknown_08452B90
+gUnknown_08452B90: @ 8452B90
+	.incbin "baserom.gba", 0x00452b90, 0x600
+
+	.global gUnknown_08453190
+gUnknown_08453190: @ 8453190
+	.incbin "baserom.gba", 0x00453190, 0x600
+
+	.global gUnknown_08453790
+gUnknown_08453790: @ 8453790
+	.incbin "baserom.gba", 0x00453790, 0x30
+
+	.global gUnknown_084537C0
+gUnknown_084537C0: @ 84537C0
+	.incbin "baserom.gba", 0x004537c0, 0x600
+
+	.global gUnknown_08453DC0
+gUnknown_08453DC0: @ 8453DC0
+	.incbin "baserom.gba", 0x00453dc0, 0x600
+
+	.global gUnknown_084543C0
+gUnknown_084543C0: @ 84543C0
+	.incbin "baserom.gba", 0x004543c0, 0x600
+
+	.global gUnknown_084549C0
+gUnknown_084549C0: @ 84549C0
+	.incbin "baserom.gba", 0x004549c0, 0xa9c
+
+	.global gMPlayTable
+gMPlayTable: @ 845545C
+	.incbin "baserom.gba", 0x0045545c, 0x30
+
+	.global gSongTable
+gSongTable: @ 845548C
+	.incbin "baserom.gba", 0x0045548c, 0x25B29C
diff --git a/include/gba/gba.h b/include/gba/gba.h
index 10b2ffa43..9cacbfee0 100644
--- a/include/gba/gba.h
+++ b/include/gba/gba.h
@@ -27,6 +27,11 @@ typedef u32 bool32;
 #define TRUE  1
 #define FALSE 0
 
+#define IWRAM_DATA __attribute__((section("iwram_data")))
+#define EWRAM_DATA __attribute__((section("ewram_data")))
+
+#define ALIGNED(n) __attribute__((aligned(n)))
+
 #include "gba/io_reg.h"
 #include "gba/syscall.h"
 #include "gba/macro.h"
diff --git a/include/gba/io_reg.h b/include/gba/io_reg.h
index 92dd49a01..e29441f19 100644
--- a/include/gba/io_reg.h
+++ b/include/gba/io_reg.h
@@ -447,6 +447,26 @@
 #define DISPSTAT_HBLANK_INTR 0x0010 // H-Blank interrupt enabled
 #define DISPSTAT_VCOUNT_INTR 0x0020 // V-Count interrupt enabled
 
+// SOUNDCNT_H
+#define SOUND_CGB_MIX_QUARTER 0x0000
+#define SOUND_CGB_MIX_HALF    0x0001
+#define SOUND_CGB_MIX_FULL    0x0002
+#define SOUND_A_MIX_HALF      0x0000
+#define SOUND_A_MIX_FULL      0x0004
+#define SOUND_B_MIX_HALF      0x0000
+#define SOUND_B_MIX_FULL      0x0008
+#define SOUND_ALL_MIX_FULL    0x000E
+#define SOUND_A_RIGHT_OUTPUT  0x0100
+#define SOUND_A_LEFT_OUTPUT   0x0200
+#define SOUND_A_TIMER_0       0x0000
+#define SOUND_A_TIMER_1       0x0400
+#define SOUND_A_FIFO_RESET    0x0800
+#define SOUND_B_RIGHT_OUTPUT  0x1000
+#define SOUND_B_LEFT_OUTPUT   0x2000
+#define SOUND_B_TIMER_0       0x0000
+#define SOUND_B_TIMER_1       0x4000
+#define SOUND_B_FIFO_RESET    0x8000
+
 // SOUNDCNT_X
 #define SOUND_1_ON          0x0001
 #define SOUND_2_ON          0x0002
diff --git a/include/gba/m4a_internal.h b/include/gba/m4a_internal.h
new file mode 100644
index 000000000..c09cde31f
--- /dev/null
+++ b/include/gba/m4a_internal.h
@@ -0,0 +1,442 @@
+#include "gba/gba.h"
+
+// ASCII encoding of 'Smsh' in reverse
+// This is presumably short for SMASH, the developer of MKS4AGB.
+#define ID_NUMBER 0x68736D53
+
+#define C_V 0x40 // center value for PAN, BEND, and TUNE
+
+#define SOUND_MODE_REVERB_VAL   0x0000007F
+#define SOUND_MODE_REVERB_SET   0x00000080
+#define SOUND_MODE_MAXCHN       0x00000F00
+#define SOUND_MODE_MAXCHN_SHIFT 8
+#define SOUND_MODE_MASVOL       0x0000F000
+#define SOUND_MODE_MASVOL_SHIFT 12
+#define SOUND_MODE_FREQ_05734   0x00010000
+#define SOUND_MODE_FREQ_07884   0x00020000
+#define SOUND_MODE_FREQ_10512   0x00030000
+#define SOUND_MODE_FREQ_13379   0x00040000
+#define SOUND_MODE_FREQ_15768   0x00050000
+#define SOUND_MODE_FREQ_18157   0x00060000
+#define SOUND_MODE_FREQ_21024   0x00070000
+#define SOUND_MODE_FREQ_26758   0x00080000
+#define SOUND_MODE_FREQ_31536   0x00090000
+#define SOUND_MODE_FREQ_36314   0x000A0000
+#define SOUND_MODE_FREQ_40137   0x000B0000
+#define SOUND_MODE_FREQ_42048   0x000C0000
+#define SOUND_MODE_FREQ         0x000F0000
+#define SOUND_MODE_FREQ_SHIFT   16
+#define SOUND_MODE_DA_BIT_9     0x00800000
+#define SOUND_MODE_DA_BIT_8     0x00900000
+#define SOUND_MODE_DA_BIT_7     0x00A00000
+#define SOUND_MODE_DA_BIT_6     0x00B00000
+#define SOUND_MODE_DA_BIT       0x00B00000
+#define SOUND_MODE_DA_BIT_SHIFT 20
+
+struct WaveData
+{
+    u16 type;
+    u16 status;
+    u32 freq;
+    u32 loopStart;
+    u32 size; // number of samples
+    s8 data[1]; // samples
+};
+
+#define TONEDATA_TYPE_CGB    0x07
+#define TONEDATA_TYPE_FIX    0x08
+#define TONEDATA_TYPE_SPL    0x40
+#define TONEDATA_TYPE_RHY    0x80
+
+#define TONEDATA_P_S_PAN    0xc0
+#define TONEDATA_P_S_PAM    TONEDATA_P_S_PAN
+
+struct ToneData
+{
+    u8 type;
+    u8 key;
+    u8 length; // sound length (compatible sound)
+    u8 pan_sweep; // pan or sweep (compatible sound ch. 1)
+    struct WaveData *wav;
+    u8 attack;
+    u8 decay;
+    u8 sustain;
+    u8 release;
+};
+
+struct CgbChannel
+{
+    u8 sf;
+    u8 ty;
+    u8 rightVolume;
+    u8 leftVolume;
+    u8 at;
+    u8 de;
+    u8 su;
+    u8 re;
+    u8 ky;
+    u8 ev;
+    u8 eg;
+    u8 ec;
+    u8 echoVolume;
+    u8 echoLength;
+    u8 d1;
+    u8 d2;
+    u8 gt;
+    u8 mk;
+    u8 ve;
+    u8 pr;
+    u8 rp;
+    u8 d3[3];
+    u8 d5;
+    u8 sg;
+    u8 n4;
+    u8 pan;
+    u8 panMask;
+    u8 mo;
+    u8 le;
+    u8 sw;
+    u32 fr;
+    u32 wp;
+    u32 cp;
+    u32 tp;
+    u32 pp;
+    u32 np;
+    u8 d4[8];
+};
+
+struct MusicPlayerTrack;
+
+struct SoundChannel
+{
+    u8 status;
+    u8 type;
+    u8 rightVolume;
+    u8 leftVolume;
+    u8 attack;
+    u8 decay;
+    u8 sustain;
+    u8 release;
+    u8 ky;
+    u8 ev;
+    u8 er;
+    u8 el;
+    u8 echoVolume;
+    u8 echoLength;
+    u8 d1;
+    u8 d2;
+    u8 gt;
+    u8 mk;
+    u8 ve;
+    u8 pr;
+    u8 rp;
+    u8 d3[3];
+    u32 ct;
+    u32 fw;
+    u32 freq;
+    struct WaveData *wav;
+    u32 cp;
+    struct MusicPlayerTrack *track;
+    u32 pp;
+    u32 np;
+    u32 d4;
+    u16 xpi;
+    u16 xpc;
+};
+
+#define MAX_DIRECTSOUND_CHANNELS 12
+
+#define PCM_DMA_BUF_SIZE 1584 // size of Direct Sound buffer
+
+struct SoundInfo
+{
+    // This field is normally equal to ID_NUMBER but it is set to other
+    // values during sensitive operations for locking purposes.
+    // This field should be volatile but isn't. This could potentially cause
+    // race conditions.
+    u32 ident;
+
+    vu8 pcmDmaCounter;
+
+    // Direct Sound
+    u8 reverb;
+    u8 maxChans;
+    u8 masterVolume;
+    u8 freq;
+
+    u8 mode;
+    u8 c15;
+    u8 pcmDmaPeriod; // number of V-blanks per PCM DMA
+    u8 maxLines;
+    u8 gap[3];
+    s32 pcmSamplesPerVBlank;
+    s32 pcmFreq;
+    s32 divFreq;
+    struct CgbChannel *cgbChans;
+    u32 func;
+    u32 intp;
+    void (*CgbSound)(void);
+    void (*CgbOscOff)(u8);
+    u32 (*MidiKeyToCgbFreq)(u8, u8, u8);
+    u32 MPlayJumpTable;
+    u32 plynote;
+    u32 ExtVolPit;
+    u8 gap2[16];
+    struct SoundChannel chans[MAX_DIRECTSOUND_CHANNELS];
+    s8 pcmBuffer[PCM_DMA_BUF_SIZE * 2];
+};
+
+struct SongHeader
+{
+    u8 trackCount;
+    u8 blockCount;
+    u8 priority;
+    u8 reverb;
+    struct ToneData *tone;
+    u8 *part[1];
+};
+
+struct PokemonCrySong
+{
+    u8 trackCount;
+    u8 blockCount;
+    u8 priority;
+    u8 reverb;
+    struct ToneData *tone;
+    u8 *part[2];
+    u8 gap;
+    u8 part0; // 0x11
+    u8 tuneValue; // 0x12
+    u8 gotoCmd; // 0x13
+    u32 gotoTarget; // 0x14
+    u8 part1; // 0x18
+    u8 tuneValue2; // 0x19
+    u8 cont[2]; // 0x1A
+    u8 volCmd; // 0x1C
+    u8 volumeValue; // 0x1D
+    u8 unkCmd0D[2]; // 0x1E
+    u32 unkCmd0DParam; // 0x20
+    u8 xreleCmd[2]; // 0x24
+    u8 releaseValue; // 0x26
+    u8 panCmd;
+    u8 panValue; // 0x28
+    u8 tieCmd; // 0x29
+    u8 tieKeyValue; // 0x2A
+    u8 tieVelocityValue; // 0x2B
+    u8 unkCmd0C[2]; // 0x2C
+    u16 unkCmd0CParam; // 0x2E
+    u8 end[2]; // 0x30
+};
+
+#define MPT_FLG_VOLSET 0x01
+#define MPT_FLG_VOLCHG 0x03
+#define MPT_FLG_PITSET 0x04
+#define MPT_FLG_PITCHG 0x0C
+#define MPT_FLG_START  0x40
+#define MPT_FLG_EXIST  0x80
+
+struct MusicPlayerTrack
+{
+    u8 flags;
+    u8 wai;
+    u8 patP;
+    u8 repN;
+    u8 gat;
+    u8 key;
+    u8 vel;
+    u8 run;
+    u8 keyM;
+    u8 pitM;
+    s8 keyShift;
+    s8 keyShiftX;
+    s8 tune;
+    u8 pitX;
+    s8 bend;
+    u8 bendRange;
+    u8 volMR;
+    u8 volML;
+    u8 vol;
+    u8 volX;
+    s8 pan;
+    s8 panX;
+    s8 modM;
+    u8 mod;
+    u8 modT;
+    u8 lfoSpeed;
+    u8 lfoSpeedC;
+    u8 lfoDelay;
+    u8 lfoDelayC;
+    u8 priority;
+    u8 echoVolume;
+    u8 echoLength;
+    struct SoundChannel *chan;
+    struct ToneData tone;
+    u8 gap[10];
+    u16 unk_3A;
+    u32 unk_3C;
+    u8 *cmdPtr;
+    u8 patS[12];
+};
+
+#define MUSICPLAYER_STATUS_TRACK 0x0000ffff
+#define MUSICPLAYER_STATUS_PAUSE 0x80000000
+
+#define MAX_MUSICPLAYER_TRACKS 16
+
+#define STOP_AFTER_FADE 0x0001
+#define FADE_IN         0x0002
+#define FADE_VOL_MAX    64
+#define FADE_VOL_SHIFT  2
+
+struct MusicPlayerInfo
+{
+    struct SongHeader *songHeader;
+    u32 status;
+    u8 trackCount;
+    u8 priority;
+    u8 cmd;
+    u8 unk_B;
+    u32 clock;
+    u8 gap[8];
+    u8 *memAccArea;
+    u16 tempoD;
+    u16 tempoU;
+    u16 tempoI;
+    u16 tempoC;
+    u16 fadeOI;
+    u16 fadeOC;
+    u16 fadeOV;
+    struct MusicPlayerTrack *tracks;
+    struct ToneData *tone;
+    u32 ident;
+    u32 func;
+    u32 intp;
+};
+
+struct MusicPlayer
+{
+    struct MusicPlayerInfo *info;
+    struct MusicPlayerTrack *track;
+    u8 unk_8;
+    u16 unk_A;
+};
+
+struct Song
+{
+    struct SongHeader *header;
+    u16 ms;
+    u16 me;
+};
+
+extern const struct MusicPlayer gMPlayTable[];
+extern const struct Song gSongTable[];
+
+
+
+extern u8 gMPlayMemAccArea[];
+
+//u8 gPokemonCrySong[52];
+//u8 gPokemonCrySongs[52 * MAX_POKEMON_CRIES];
+
+#define MAX_POKEMON_CRIES 2
+
+extern struct PokemonCrySong gPokemonCrySong;
+extern struct PokemonCrySong gPokemonCrySongs[];
+
+extern struct MusicPlayerInfo gPokemonCryMusicPlayers[];
+extern struct MusicPlayerTrack gPokemonCryTracks[];
+
+extern char SoundMainRAM[];
+
+extern void *gMPlayJumpTable[];
+
+typedef void (*XcmdFunc)(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+extern const XcmdFunc gXcmdTable[];
+
+extern struct CgbChannel gCgbChans[];
+
+extern const u8 gScaleTable[];
+extern const u32 gFreqTable[];
+extern const u16 gPcmSamplesPerVBlankTable[];
+
+extern const u8 gCgbScaleTable[];
+extern const s16 gCgbFreqTable[];
+extern const u8 gNoiseTable[];
+
+extern const struct PokemonCrySong gPokemonCrySongTemplate;
+
+extern const struct ToneData gUnknown_0842FC88;
+
+extern char gNumMusicPlayers[];
+extern char gMaxLines[];
+
+#define NUM_MUSIC_PLAYERS ((u16)gNumMusicPlayers)
+#define MAX_LINES ((u32)gMaxLines)
+
+u32 umul3232H32(u32 multiplier, u32 multiplicand);
+void SoundMain(void);
+void SoundMainBTM(void);
+void TrackStop(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track);
+void MPlayMain(void);
+void RealClearChain(void *x);
+
+void MPlayContinue(struct MusicPlayerInfo *mplayInfo);
+void MPlayStart(struct MusicPlayerInfo *mplayInfo, struct SongHeader *songHeader);
+void m4aMPlayStop(struct MusicPlayerInfo *mplayInfo);
+void FadeOutBody(struct MusicPlayerInfo *mplayInfo);
+void TrkVolPitSet(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track);
+void MPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed);
+void ClearChain(void *x);
+void Clear64byte(void *addr);
+void SoundInit(struct SoundInfo *soundInfo);
+void MPlayExtender(struct CgbChannel *cgbChans);
+void m4aSoundMode(u32 mode);
+void MPlayOpen(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track, u8 a3);
+void CgbSound(void);
+void CgbOscOff(u8);
+u32 MidiKeyToCgbFreq(u8, u8, u8);
+void DummyFunc(void);
+void MPlayJumpTableCopy(void **mplayJumpTable);
+void SampleFreqSet(u32 freq);
+void m4aSoundVSyncOn(void);
+void m4aSoundVSyncOff(void);
+
+// sound command handler functions
+void ply_fine(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_goto(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_patt(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_pend(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_rept(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_memacc(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_prio(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_tempo(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_keysh(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_voice(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_vol(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_pan(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_bend(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_bendr(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_lfos(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_lfodl(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_mod(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_modt(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_tune(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_port(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xcmd(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_endtie(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_note(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+
+// extended sound command handler functions
+void ply_xxx(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xwave(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xtype(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xatta(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xdeca(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xsust(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xrele(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xiecv(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xiecl(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xleng(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xswee(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xcmd_0C(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
+void ply_xcmd_0D(struct MusicPlayerInfo *, struct MusicPlayerTrack *);
diff --git a/iwram_syms.txt b/iwram_syms.txt
index 308762876..cfe24cf57 100644
--- a/iwram_syms.txt
+++ b/iwram_syms.txt
@@ -1,3 +1,5 @@
+/* .bss starts at 0x3000000 */
+
 gRtcErrorStatus = 0x3000458;
 gRtc = 0x3000460;
 gRtcProbeResult = 0x300046C;
@@ -5,12 +7,9 @@ gRtcSavedIme = 0x300046E;
 
 gPlayTimeCounterState = 0x300057C;
 
-sTimerNum = 0x3000F28;
-sTimerCount = 0x3000F2A;
-sTimerReg = 0x3000F2C;
-sSavedIme = 0x3000F30;
+/* .bss.code starts at 0x3000F60 */
 
-gSiiRtcLocked = 0x3000F36;
+/* COMMON starts at 0x3001760 */
 
 gUnknownStringVar = 0x3002900;
 
@@ -18,6 +17,8 @@ gLocalTime = 0x3004038;
 
 gTasks = 0x3004B20;
 
+gMPlayMemAccArea = 0x3007440;
+
 gFlashTimeoutFlag = 0x3007490;
 PollFlashStatus = 0x3007494;
 WaitForFlashWrite = 0x3007498;
diff --git a/ld_script.txt b/ld_script.txt
index dc45c7c27..ec1555c37 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -1,12 +1,22 @@
 ENTRY(Start)
 
+gNumMusicPlayers = 4;
+gMaxLines = 60;
+
 SECTIONS {
-    .bss :
+    . = 0x3000000;
+
+    iwram (NOLOAD) :
     ALIGN(4)
     {
-        . = 0x3000F38;
+        . = 0xF28;
+        src/agb_flash.o(.bss);
+        src/siirtc.o(.bss);
         tools/agbcc/lib/libgcc.a:dp-bit.o(.bss);
         tools/agbcc/lib/libgcc.a:fp-bit.o(.bss);
+        src/m4a_2.o(.bss.code);
+        . = 0x5FD0;
+        src/m4a_2.o(iwram_data);
     }
 
     . = 0x8000000;
@@ -36,7 +46,10 @@ SECTIONS {
     ALIGN(4)
     {
         asm/libgcnmultiboot.o(.text);
-        asm/libmks4agb.o(.text);
+        asm/m4a_1.o(.text);
+        src/m4a_2.o(.text);
+        asm/m4a_3.o(.text);
+        src/m4a_4.o(.text);
         src/agb_flash.o(.text);
         src/agb_flash_1m.o(.text);
         src/agb_flash_mx.o(.text);
@@ -63,6 +76,8 @@ SECTIONS {
     ALIGN(4)
     {
         data/data2.o(.rodata);
+        src/m4a_tables.o(.rodata);
+        data/sound_data.o(.rodata);
         src/agb_flash.o(.rodata);
         src/agb_flash_1m.o(.rodata);
         src/agb_flash_mx.o(.rodata);
diff --git a/src/agb_flash.c b/src/agb_flash.c
index 834b80842..e3ac96623 100644
--- a/src/agb_flash.c
+++ b/src/agb_flash.c
@@ -1,10 +1,10 @@
 #include "gba/gba.h"
 #include "gba/flash_internal.h"
 
-extern u8 sTimerNum;
-extern u16 sTimerCount;
-extern vu16 *sTimerReg;
-extern u16 sSavedIme;
+static u8 sTimerNum;
+static u16 sTimerCount;
+static vu16 *sTimerReg;
+static u16 sSavedIme;
 
 extern u8 gFlashTimeoutFlag;
 extern u8 (*PollFlashStatus)(u8 *);
diff --git a/src/m4a_2.c b/src/m4a_2.c
new file mode 100644
index 000000000..b41574c23
--- /dev/null
+++ b/src/m4a_2.c
@@ -0,0 +1,911 @@
+#include "gba/m4a_internal.h"
+
+#define BSS_CODE __attribute__((section(".bss.code")))
+
+BSS_CODE char SoundMainRAM_Buffer[0x800] = {0};
+
+IWRAM_DATA struct SoundInfo gSoundInfo = {0};
+IWRAM_DATA struct PokemonCrySong gPokemonCrySongs[MAX_POKEMON_CRIES] = {0};
+IWRAM_DATA u8 gUnused_3006FE8[8] = {0}; // padding for alignment
+IWRAM_DATA struct MusicPlayerInfo gPokemonCryMusicPlayers[MAX_POKEMON_CRIES] = {0};
+IWRAM_DATA void *gMPlayJumpTable[36] = {0};
+IWRAM_DATA struct CgbChannel gCgbChans[4] = {0};
+IWRAM_DATA struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2] = {0};
+IWRAM_DATA struct PokemonCrySong gPokemonCrySong = {0};
+
+u32 MidiKeyToFreq(struct WaveData *wav, u8 key, u8 fineAdjust)
+{
+    u32 val1;
+    u32 val2;
+    u32 fineAdjustShifted = fineAdjust << 24;
+
+    if (key > 178)
+    {
+        key = 178;
+        fineAdjustShifted = 255 << 24;
+    }
+
+    val1 = gScaleTable[key];
+    val1 = gFreqTable[val1 & 0xF] >> (val1 >> 4);
+
+    val2 = gScaleTable[key + 1];
+    val2 = gFreqTable[val2 & 0xF] >> (val2 >> 4);
+
+    return umul3232H32(wav->freq, val1 + umul3232H32(val2 - val1, fineAdjustShifted));
+}
+
+void UnusedDummyFunc()
+{
+}
+
+void MPlayContinue(struct MusicPlayerInfo *mplayInfo)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->status &= ~MUSICPLAYER_STATUS_PAUSE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void MPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT);
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aSoundInit(void)
+{
+    s32 i;
+
+    CpuCopy32((void *)((s32)SoundMainRAM & ~1), SoundMainRAM_Buffer, sizeof(SoundMainRAM_Buffer));
+
+    SoundInit(&gSoundInfo);
+    MPlayExtender(gCgbChans);
+    m4aSoundMode(SOUND_MODE_DA_BIT_8
+               | SOUND_MODE_FREQ_13379
+               | (12 << SOUND_MODE_MASVOL_SHIFT)
+               | (5 << SOUND_MODE_MAXCHN_SHIFT));
+
+    for (i = 0; i < NUM_MUSIC_PLAYERS; i++)
+    {
+        struct MusicPlayerInfo *mplayInfo = gMPlayTable[i].info;
+        MPlayOpen(mplayInfo, gMPlayTable[i].track, gMPlayTable[i].unk_8);
+        mplayInfo->unk_B = gMPlayTable[i].unk_A;
+        mplayInfo->memAccArea = gMPlayMemAccArea;
+    }
+
+    memcpy(&gPokemonCrySong, &gPokemonCrySongTemplate, sizeof(struct PokemonCrySong));
+
+    for (i = 0; i < MAX_POKEMON_CRIES; i++)
+    {
+        struct MusicPlayerInfo *mplayInfo = &gPokemonCryMusicPlayers[i];
+        struct MusicPlayerTrack *track = &gPokemonCryTracks[i * 2];
+        MPlayOpen(mplayInfo, track, 2);
+        track->chan = 0;
+    }
+}
+
+void m4aSoundMain(void)
+{
+    SoundMain();
+}
+
+void m4aSongNumStart(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    MPlayStart(mplay->info, song->header);
+}
+
+void m4aSongNumStartOrChange(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader != song->header)
+    {
+        MPlayStart(mplay->info, song->header);
+    }
+    else
+    {
+        if ((mplay->info->status & MUSICPLAYER_STATUS_TRACK) == 0
+         || (mplay->info->status & MUSICPLAYER_STATUS_PAUSE))
+        {
+            MPlayStart(mplay->info, song->header);
+        }
+    }
+}
+
+void m4aSongNumStartOrContinue(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader != song->header)
+        MPlayStart(mplay->info, song->header);
+    else if ((mplay->info->status & MUSICPLAYER_STATUS_TRACK) == 0)
+        MPlayStart(mplay->info, song->header);
+    else if (mplay->info->status & MUSICPLAYER_STATUS_PAUSE)
+        MPlayContinue(mplay->info);
+}
+
+void m4aSongNumStop(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader == song->header)
+        m4aMPlayStop(mplay->info);
+}
+
+void m4aSongNumContinue(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader == song->header)
+        MPlayContinue(mplay->info);
+}
+
+void m4aMPlayAllStop(void)
+{
+    s32 i;
+
+    for (i = 0; i < NUM_MUSIC_PLAYERS; i++)
+        m4aMPlayStop(gMPlayTable[i].info);
+
+    for (i = 0; i < MAX_POKEMON_CRIES; i++)
+        m4aMPlayStop(&gPokemonCryMusicPlayers[i]);
+}
+
+void m4aMPlayContinue(struct MusicPlayerInfo *mplayInfo)
+{
+    MPlayContinue(mplayInfo);
+}
+
+void m4aMPlayAllContinue(void)
+{
+    s32 i;
+
+    for (i = 0; i < NUM_MUSIC_PLAYERS; i++)
+        MPlayContinue(gMPlayTable[i].info);
+
+    for (i = 0; i < MAX_POKEMON_CRIES; i++)
+        MPlayContinue(&gPokemonCryMusicPlayers[i]);
+}
+
+void m4aMPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    MPlayFadeOut(mplayInfo, speed);
+}
+
+void sub_81DE0D0(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT) | STOP_AFTER_FADE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void sub_81DE0F0(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (0 << FADE_VOL_SHIFT) | FADE_IN;
+        mplayInfo->status &= ~MUSICPLAYER_STATUS_PAUSE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayImmInit(struct MusicPlayerInfo *mplayInfo)
+{
+    s32 trackCount = mplayInfo->trackCount;
+    struct MusicPlayerTrack *track = mplayInfo->tracks;
+
+    while (trackCount > 0)
+    {
+        if (track->flags & MPT_FLG_EXIST)
+        {
+            if (track->flags & MPT_FLG_START)
+            {
+                Clear64byte(track);
+                track->flags = MPT_FLG_EXIST;
+                track->bendRange = 2;
+                track->volX = 64;
+                track->lfoSpeed = 22;
+                track->tone.type = 1;
+            }
+        }
+
+        trackCount--;
+        track++;
+    }
+}
+
+void MPlayExtender(struct CgbChannel *cgbChans)
+{
+    struct SoundInfo *soundInfo;
+    u32 ident;
+    register u32 maxLines asm("r0");
+
+    REG_SOUNDCNT_X = SOUND_MASTER_ENABLE
+                   | SOUND_4_ON
+                   | SOUND_3_ON
+                   | SOUND_2_ON
+                   | SOUND_1_ON;
+    REG_SOUNDCNT_L = 0; // set master volume to zero
+    REG_NR12 = 0x8;
+    REG_NR22 = 0x8;
+    REG_NR42 = 0x8;
+    REG_NR14 = 0x80;
+    REG_NR24 = 0x80;
+    REG_NR44 = 0x80;
+    REG_NR30 = 0;
+    REG_NR50 = 0x77;
+
+    soundInfo = SOUND_INFO_PTR;
+
+    ident = soundInfo->ident;
+
+    if (ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    gMPlayJumpTable[8] = ply_memacc;
+    gMPlayJumpTable[17] = ply_lfos;
+    gMPlayJumpTable[19] = ply_mod;
+    gMPlayJumpTable[28] = ply_xcmd;
+    gMPlayJumpTable[29] = ply_endtie;
+    gMPlayJumpTable[30] = SampleFreqSet;
+    gMPlayJumpTable[31] = TrackStop;
+    gMPlayJumpTable[32] = FadeOutBody;
+    gMPlayJumpTable[33] = TrkVolPitSet;
+
+    soundInfo->cgbChans = (struct CgbChannel *)cgbChans;
+    soundInfo->CgbSound = CgbSound;
+    soundInfo->CgbOscOff = CgbOscOff;
+    soundInfo->MidiKeyToCgbFreq = MidiKeyToCgbFreq;
+
+    maxLines = MAX_LINES;
+    soundInfo->maxLines = maxLines;
+
+    CpuFill32(cgbChans, 0, sizeof(struct CgbChannel) * 4);
+
+    cgbChans[0].ty = 1;
+    cgbChans[0].panMask = 0x11;
+    cgbChans[1].ty = 2;
+    cgbChans[1].panMask = 0x22;
+    cgbChans[2].ty = 3;
+    cgbChans[2].panMask = 0x44;
+    cgbChans[3].ty = 4;
+    cgbChans[3].panMask = 0x88;
+
+    soundInfo->ident = ident;
+}
+
+void MusicPlayerJumpTableCopy(void)
+{
+    asm("swi 0x2A");
+}
+
+void ClearChain(void *x)
+{
+    void (*func)(void *) = *(&gMPlayJumpTable[34]);
+    func(x);
+}
+
+void Clear64byte(void *x)
+{
+    void (*func)(void *) = *(&gMPlayJumpTable[35]);
+    func(x);
+}
+
+void SoundInit(struct SoundInfo *soundInfo)
+{
+    soundInfo->ident = 0;
+
+    if (REG_DMA1CNT & (DMA_REPEAT << 16))
+        REG_DMA1CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+    if (REG_DMA2CNT & (DMA_REPEAT << 16))
+        REG_DMA2CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+    REG_DMA1CNT_H = DMA_32BIT;
+    REG_DMA2CNT_H = DMA_32BIT;
+    REG_SOUNDCNT_X = SOUND_MASTER_ENABLE
+                   | SOUND_4_ON
+                   | SOUND_3_ON
+                   | SOUND_2_ON
+                   | SOUND_1_ON;
+    REG_SOUNDCNT_H = SOUND_B_FIFO_RESET | SOUND_B_TIMER_0 | SOUND_B_LEFT_OUTPUT
+                   | SOUND_A_FIFO_RESET | SOUND_A_TIMER_0 | SOUND_A_RIGHT_OUTPUT
+                   | SOUND_ALL_MIX_FULL;
+    REG_SOUNDBIAS_H = (REG_SOUNDBIAS_H & 0x3F) | 0x40;
+
+    REG_DMA1SAD = (s32)soundInfo->pcmBuffer;
+    REG_DMA1DAD = (s32)&REG_FIFO_A;
+    REG_DMA2SAD = (s32)soundInfo->pcmBuffer + PCM_DMA_BUF_SIZE;
+    REG_DMA2DAD = (s32)&REG_FIFO_B;
+
+    SOUND_INFO_PTR = soundInfo;
+    CpuFill32(soundInfo, 0, sizeof(struct SoundInfo));
+
+    soundInfo->maxChans = 8;
+    soundInfo->masterVolume = 15;
+    soundInfo->plynote = (u32)ply_note;
+    soundInfo->CgbSound = DummyFunc;
+    soundInfo->CgbOscOff = (void (*)(u8))DummyFunc;
+    soundInfo->MidiKeyToCgbFreq = (u32 (*)(u8, u8, u8))DummyFunc;
+    soundInfo->ExtVolPit = (u32)DummyFunc;
+
+    MPlayJumpTableCopy(gMPlayJumpTable);
+
+    soundInfo->MPlayJumpTable = (u32)gMPlayJumpTable;
+
+    SampleFreqSet(SOUND_MODE_FREQ_13379);
+
+    soundInfo->ident = ID_NUMBER;
+}
+
+void SampleFreqSet(u32 freq)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    freq = (freq & 0xF0000) >> 16;
+    soundInfo->freq = freq;
+    soundInfo->pcmSamplesPerVBlank = gPcmSamplesPerVBlankTable[freq - 1];
+    soundInfo->pcmDmaPeriod = PCM_DMA_BUF_SIZE / soundInfo->pcmSamplesPerVBlank;
+
+    // LCD refresh rate 59.7275Hz
+    soundInfo->pcmFreq = (597275 * soundInfo->pcmSamplesPerVBlank + 5000) / 10000;
+
+    // CPU frequency 16.78Mhz
+    soundInfo->divFreq = (16777216 / soundInfo->pcmFreq + 1) >> 1;
+
+    // Turn off timer 0.
+    REG_TM0CNT_H = 0;
+
+    // cycles per LCD fresh 280896
+    REG_TM0CNT_L = -(280896 / soundInfo->pcmSamplesPerVBlank);
+
+    m4aSoundVSyncOn();
+
+    while (*(vu8 *)REG_ADDR_VCOUNT == 159)
+        ;
+
+    while (*(vu8 *)REG_ADDR_VCOUNT != 159)
+        ;
+
+    REG_TM0CNT_H = TIMER_ENABLE | TIMER_1CLK;
+}
+
+void m4aSoundMode(u32 mode)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    u32 temp;
+
+    if (soundInfo->ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    temp = mode & (SOUND_MODE_REVERB_SET | SOUND_MODE_REVERB_VAL);
+
+    if (temp)
+        soundInfo->reverb = temp & SOUND_MODE_REVERB_VAL;
+
+    temp = mode & SOUND_MODE_MAXCHN;
+
+    if (temp)
+    {
+        struct SoundChannel *chan;
+
+        soundInfo->maxChans = temp >> SOUND_MODE_MAXCHN_SHIFT;
+
+        temp = MAX_DIRECTSOUND_CHANNELS;
+        chan = &soundInfo->chans[0];
+
+        while (temp != 0)
+        {
+            chan->status = 0;
+            temp--;
+            chan++;
+        }
+    }
+
+    temp = mode & SOUND_MODE_MASVOL;
+
+    if (temp)
+        soundInfo->masterVolume = temp >> SOUND_MODE_MASVOL_SHIFT;
+
+    temp = mode & SOUND_MODE_DA_BIT;
+
+    if (temp)
+    {
+        temp = (temp & 0x300000) >> 14;
+        REG_SOUNDBIAS_H = (REG_SOUNDBIAS_H & 0x3F) | temp;
+    }
+
+    temp = mode & SOUND_MODE_FREQ;
+
+    if (temp)
+    {
+        m4aSoundVSyncOff();
+        SampleFreqSet(temp);
+    }
+
+    soundInfo->ident = ID_NUMBER;
+}
+
+void SoundClear(void)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    s32 i;
+    void *chan;
+
+    if (soundInfo->ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    i = MAX_DIRECTSOUND_CHANNELS;
+    chan = &soundInfo->chans[0];
+
+    while (i > 0)
+    {
+        ((struct SoundChannel *)chan)->status = 0;
+        i--;
+        chan = (void *)((s32)chan + sizeof(struct SoundChannel));
+    }
+
+    chan = soundInfo->cgbChans;
+
+    if (chan)
+    {
+        i = 1;
+
+        while (i <= 4)
+        {
+            soundInfo->CgbOscOff(i);
+            ((struct CgbChannel *)chan)->sf = 0;
+            i++;
+            chan = (void *)((s32)chan + sizeof(struct CgbChannel));
+        }
+    }
+
+    soundInfo->ident = ID_NUMBER;
+}
+
+void m4aSoundVSyncOff(void)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    if (soundInfo->ident >= ID_NUMBER && soundInfo->ident <= ID_NUMBER + 1)
+    {
+        soundInfo->ident += 10;
+
+        if (REG_DMA1CNT & (DMA_REPEAT << 16))
+            REG_DMA1CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+        if (REG_DMA2CNT & (DMA_REPEAT << 16))
+            REG_DMA2CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+        REG_DMA1CNT_H = DMA_32BIT;
+        REG_DMA2CNT_H = DMA_32BIT;
+
+        CpuFill32(soundInfo->pcmBuffer, 0, sizeof(soundInfo->pcmBuffer));
+    }
+}
+
+void m4aSoundVSyncOn(void)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    u32 ident = soundInfo->ident;
+
+    if (ident == ID_NUMBER)
+        return;
+
+    REG_DMA1CNT_H = DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT;
+    REG_DMA2CNT_H = DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT;
+
+    soundInfo->pcmDmaCounter = 0;
+    soundInfo->ident = ident - 10;
+}
+
+void MPlayOpen(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *tracks, u8 trackCount)
+{
+    struct SoundInfo *soundInfo;
+
+    if (trackCount == 0)
+        return;
+
+    if (trackCount > MAX_MUSICPLAYER_TRACKS)
+        trackCount = MAX_MUSICPLAYER_TRACKS;
+
+    soundInfo = SOUND_INFO_PTR;
+
+    if (soundInfo->ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    Clear64byte(mplayInfo);
+
+    mplayInfo->tracks = tracks;
+    mplayInfo->trackCount = trackCount;
+    mplayInfo->status = MUSICPLAYER_STATUS_PAUSE;
+
+    while (trackCount != 0)
+    {
+        tracks->flags = 0;
+        trackCount--;
+        tracks++;
+    }
+
+    if (soundInfo->func != 0)
+    {
+        mplayInfo->func = soundInfo->func;
+        mplayInfo->intp = soundInfo->intp;
+        soundInfo->func = 0;
+    }
+
+    soundInfo->intp = (u32)mplayInfo;
+    soundInfo->func = (u32)MPlayMain;
+    soundInfo->ident = ID_NUMBER;
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void MPlayStart(struct MusicPlayerInfo *mplayInfo, struct SongHeader *songHeader)
+{
+    s32 i;
+    u8 unk_B;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    unk_B = mplayInfo->unk_B;
+
+    if (!unk_B
+        || ((!mplayInfo->songHeader || !(mplayInfo->tracks[0].flags & MPT_FLG_START))
+            && ((mplayInfo->status & MUSICPLAYER_STATUS_TRACK) == 0
+                || (mplayInfo->status & MUSICPLAYER_STATUS_PAUSE)))
+        || (mplayInfo->priority <= songHeader->priority))
+    {
+        mplayInfo->ident++;
+        mplayInfo->status = 0;
+        mplayInfo->songHeader = songHeader;
+        mplayInfo->tone = songHeader->tone;
+        mplayInfo->priority = songHeader->priority;
+        mplayInfo->clock = 0;
+        mplayInfo->tempoD = 150;
+        mplayInfo->tempoI = 150;
+        mplayInfo->tempoU = 0x100;
+        mplayInfo->tempoC = 0;
+        mplayInfo->fadeOI = 0;
+
+        i = 0;
+        track = mplayInfo->tracks;
+
+        while (i < songHeader->trackCount && i < mplayInfo->trackCount)
+        {
+            TrackStop(mplayInfo, track);
+            track->flags = MPT_FLG_EXIST | MPT_FLG_START;
+            track->chan = 0;
+            track->cmdPtr = songHeader->part[i];
+            i++;
+            track++;
+        }
+
+        while (i < mplayInfo->trackCount)
+        {
+            TrackStop(mplayInfo, track);
+            track->flags = 0;
+            i++;
+            track++;
+        }
+
+        if (songHeader->reverb & 0x80)
+            m4aSoundMode(songHeader->reverb);
+
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayStop(struct MusicPlayerInfo *mplayInfo)
+{
+    s32 i;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+    mplayInfo->status |= MUSICPLAYER_STATUS_PAUSE;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+
+    while (i > 0)
+    {
+        TrackStop(mplayInfo, track);
+        i--;
+        track++;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
+{
+    s32 i;
+    struct MusicPlayerTrack *track;
+    u16 fadeOI = mplayInfo->fadeOI;
+    register u32 temp asm("r3");
+    register u16 mask asm("r2");
+
+    if (fadeOI == 0)
+        return;
+
+    mplayInfo->fadeOC--;
+
+    temp = 0xFFFF;
+    mask = temp;
+
+    if (mplayInfo->fadeOC != 0)
+        return;
+
+    mplayInfo->fadeOC = fadeOI;
+
+    if (mplayInfo->fadeOV & FADE_IN)
+    {
+        mplayInfo->fadeOV += (4 << FADE_VOL_SHIFT);
+
+        if ((u16)(mplayInfo->fadeOV & mask) >= (64 << FADE_VOL_SHIFT))
+        {
+            mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT);
+            mplayInfo->fadeOI = 0;
+        }
+    }
+    else
+    {
+        mplayInfo->fadeOV -= (4 << FADE_VOL_SHIFT);
+
+        if ((s16)(mplayInfo->fadeOV & mask) <= 0)
+        {
+            i = mplayInfo->trackCount;
+            track = mplayInfo->tracks;
+
+            while (i > 0)
+            {
+                register u32 fadeOV asm("r7");
+                register u32 val asm("r0");
+
+                TrackStop(mplayInfo, track);
+
+                val = STOP_AFTER_FADE;
+                fadeOV = mplayInfo->fadeOV;
+                val &= fadeOV;
+
+                if (!val)
+                    track->flags = val;
+
+                i--;
+                track++;
+            }
+
+            if (mplayInfo->fadeOV & STOP_AFTER_FADE)
+                mplayInfo->status |= MUSICPLAYER_STATUS_PAUSE;
+            else
+                mplayInfo->status = MUSICPLAYER_STATUS_PAUSE;
+
+            mplayInfo->fadeOI = 0;
+            return;
+        }
+    }
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+
+    while (i > 0)
+    {
+        if (track->flags & MPT_FLG_EXIST)
+        {
+            track->volX = (mplayInfo->fadeOV >> FADE_VOL_SHIFT);
+            track->flags |= MPT_FLG_VOLCHG;
+        }
+
+        i--;
+        track++;
+    }
+}
+
+void TrkVolPitSet(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    if (track->flags & MPT_FLG_VOLSET)
+    {
+        s32 x;
+        s32 y;
+
+        x = (u32)(track->vol * track->volX) >> 5;
+
+        if (track->modT == 1)
+            x = (u32)(x * (track->modM + 128)) >> 7;
+
+        y = 2 * track->pan + track->panX;
+
+        if (track->modT == 2)
+            y += track->modM;
+
+        if (y < -128)
+            y = -128;
+        else if (y > 127)
+            y = 127;
+
+        track->volMR = (u32)((y + 128) * x) >> 8;
+        track->volML = (u32)((127 - y) * x) >> 8;
+    }
+
+    if (track->flags & MPT_FLG_PITSET)
+    {
+        s32 bend = track->bend * track->bendRange;
+        register s32 x asm("r1") = track->tune;
+        x += bend;
+        x *= 4;
+        x += (track->keyShift << 8);
+        x += (track->keyShiftX << 8);
+        x += track->pitX;
+
+        if (track->modT == 0)
+            x += 16 * track->modM;
+
+        track->keyM = x >> 8;
+        track->pitM = x;
+    }
+
+    track->flags &= ~(MPT_FLG_PITSET | MPT_FLG_VOLSET);
+}
+
+u32 MidiKeyToCgbFreq(u8 chanNum, u8 key, u8 fineAdjust)
+{
+    if (chanNum == 4)
+    {
+        if (key <= 20)
+        {
+            key = 0;
+        }
+        else
+        {
+            key -= 21;
+            if (key > 59)
+                key = 59;
+        }
+
+        return gNoiseTable[key];
+    }
+    else
+    {
+        s32 val1;
+        s32 val2;
+
+        if (key <= 35)
+        {
+            fineAdjust = 0;
+            key = 0;
+        }
+        else
+        {
+            key -= 36;
+            if (key > 130)
+            {
+                key = 130;
+                fineAdjust = 255;
+            }
+        }
+
+        val1 = gCgbScaleTable[key];
+        val1 = gCgbFreqTable[val1 & 0xF] >> (val1 >> 4);
+
+        val2 = gCgbScaleTable[key + 1];
+        val2 = gCgbFreqTable[val2 & 0xF] >> (val2 >> 4);
+
+        return val1 + ((fineAdjust * (val2 - val1)) >> 8) + 2048;
+    }
+}
+
+void CgbOscOff(u8 chanNum)
+{
+    switch (chanNum)
+    {
+    case 1:
+        REG_NR12 = 8;
+        REG_NR14 = 0x80;
+        break;
+    case 2:
+        REG_NR22 = 8;
+        REG_NR24 = 0x80;
+        break;
+    case 3:
+        REG_NR30 = 0;
+        break;
+    default:
+        REG_NR42 = 8;
+        REG_NR44 = 0x80;
+    }
+}
+
+static inline int CgbPan(struct CgbChannel *chan)
+{
+    u32 rightVolume = chan->rightVolume;
+    u32 leftVolume = chan->leftVolume;
+
+    if ((rightVolume = (u8)rightVolume) >= (leftVolume = (u8)leftVolume))
+    {
+        if (rightVolume / 2 >= leftVolume)
+        {
+            chan->pan = 0x0F;
+            return 1;
+        }
+    }
+    else
+    {
+        if (leftVolume / 2 >= rightVolume)
+        {
+            chan->pan = 0xF0;
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+void CgbModVol(struct CgbChannel *chan)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    if ((soundInfo->mode & 1) || !CgbPan(chan))
+    {
+        chan->pan = 0xFF;
+        chan->eg = (u32)(chan->rightVolume + chan->leftVolume) >> 4;
+    }
+    else
+    {
+        // Force chan->rightVolume and chan->leftVolume to be read from memory again,
+        // even though there is no reason to do so.
+        // The command line option "-fno-gcse" achieves the same result as this.
+        asm("" : : : "memory");
+
+        chan->eg = (u32)(chan->rightVolume + chan->leftVolume) >> 4;
+        if (chan->eg > 15)
+            chan->eg = 15;
+    }
+
+    chan->sg = (chan->eg * chan->su + 15) >> 4;
+    chan->pan &= chan->panMask;
+}
diff --git a/src/m4a_4.c b/src/m4a_4.c
new file mode 100644
index 000000000..9c7655187
--- /dev/null
+++ b/src/m4a_4.c
@@ -0,0 +1,545 @@
+#include "gba/m4a_internal.h"
+
+void m4aMPlayTempoControl(struct MusicPlayerInfo *mplayInfo, u16 tempo)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->tempoU = tempo;
+        mplayInfo->tempoI = (mplayInfo->tempoD * mplayInfo->tempoU) >> 8;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayVolumeControl(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u16 volume)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->volX = volume / 4;
+                track->flags |= MPT_FLG_VOLCHG;
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void m4aMPlayPitchControl(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u16 pitch)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->keyShiftX = (s16)pitch >> 8;
+                track->pitX = pitch;
+                track->flags |= MPT_FLG_PITCHG;
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void m4aMPlayPanpotControl(struct MusicPlayerInfo *mplayInfo, u16 trackBits, s8 pan)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->panX = pan;
+                track->flags |= MPT_FLG_VOLCHG;
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void ClearModM(struct MusicPlayerTrack *track)
+{
+    track->lfoSpeedC = 0;
+    track->modM = 0;
+
+    if (track->modT == 0)
+        track->flags |= MPT_FLG_PITCHG;
+    else
+        track->flags |= MPT_FLG_VOLCHG;
+}
+
+void m4aMPlayModDepthSet(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u8 modDepth)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->mod = modDepth;
+
+                if (!track->mod)
+                    ClearModM(track);
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void m4aMPlayLFOSpeedSet(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u8 lfoSpeed)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->lfoSpeed = lfoSpeed;
+
+                if (!track->lfoSpeed)
+                    ClearModM(track);
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+#define MEMACC_COND_JUMP(cond) \
+if (cond)                      \
+    goto cond_true;            \
+else                           \
+    goto cond_false;           \
+
+void ply_memacc(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 op;
+    u8 *addr;
+    u8 data;
+
+    op = *track->cmdPtr;
+    track->cmdPtr++;
+
+    addr = mplayInfo->memAccArea + *track->cmdPtr;
+    track->cmdPtr++;
+
+    data = *track->cmdPtr;
+    track->cmdPtr++;
+
+    switch (op)
+    {
+    case 0:
+        *addr = data;
+        return;
+    case 1:
+        *addr += data;
+        return;
+    case 2:
+        *addr -= data;
+        return;
+    case 3:
+        *addr = mplayInfo->memAccArea[data];
+        return;
+    case 4:
+        *addr += mplayInfo->memAccArea[data];
+        return;
+    case 5:
+        *addr -= mplayInfo->memAccArea[data];
+        return;
+    case 6:
+        MEMACC_COND_JUMP(*addr == data)
+        return;
+    case 7:
+        MEMACC_COND_JUMP(*addr != data)
+        return;
+    case 8:
+        MEMACC_COND_JUMP(*addr > data)
+        return;
+    case 9:
+        MEMACC_COND_JUMP(*addr >= data)
+        return;
+    case 10:
+        MEMACC_COND_JUMP(*addr <= data)
+        return;
+    case 11:
+        MEMACC_COND_JUMP(*addr < data)
+        return;
+    case 12:
+        MEMACC_COND_JUMP(*addr == mplayInfo->memAccArea[data])
+        return;
+    case 13:
+        MEMACC_COND_JUMP(*addr != mplayInfo->memAccArea[data])
+        return;
+    case 14:
+        MEMACC_COND_JUMP(*addr > mplayInfo->memAccArea[data])
+        return;
+    case 15:
+        MEMACC_COND_JUMP(*addr >= mplayInfo->memAccArea[data])
+        return;
+    case 16:
+        MEMACC_COND_JUMP(*addr <= mplayInfo->memAccArea[data])
+        return;
+    case 17:
+        MEMACC_COND_JUMP(*addr < mplayInfo->memAccArea[data])
+        return;
+    default:
+        return;
+    }
+
+cond_true:
+    {
+        void (*func)(struct MusicPlayerInfo *, struct MusicPlayerTrack *) = *(&gMPlayJumpTable[1]);
+        func(mplayInfo, track);
+        return;
+    }
+
+cond_false:
+    track->cmdPtr += 4;
+}
+
+void ply_xcmd(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 n = *track->cmdPtr;
+    track->cmdPtr++;
+
+    gXcmdTable[n](mplayInfo, track);
+}
+
+void ply_xxx(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    void (*func)(struct MusicPlayerInfo *, struct MusicPlayerTrack *) = *(&gMPlayJumpTable[0]);
+    func(mplayInfo, track);
+}
+
+#define READ_XCMD_BYTE(var, n)       \
+{                                    \
+    u32 byte = track->cmdPtr[(n)]; \
+    byte <<= n * 8;                  \
+    (var) &= ~(0xFF << (n * 8));     \
+    (var) |= byte;                   \
+}
+
+void ply_xwave(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 wav;
+
+    READ_XCMD_BYTE(wav, 0) // UB: uninitialized variable
+    READ_XCMD_BYTE(wav, 1)
+    READ_XCMD_BYTE(wav, 2)
+    READ_XCMD_BYTE(wav, 3)
+
+    track->tone.wav = (struct WaveData *)wav;
+    track->cmdPtr += 4;
+}
+
+void ply_xtype(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.type = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xatta(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.attack = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xdeca(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.decay = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xsust(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.sustain = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xrele(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.release = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xiecv(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->echoVolume = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xiecl(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->echoLength = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xleng(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.length = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xswee(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.pan_sweep = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xcmd_0C(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 unk;
+
+    READ_XCMD_BYTE(unk, 0) // UB: uninitialized variable
+    READ_XCMD_BYTE(unk, 1)
+
+    if (track->unk_3A < (u16)unk)
+    {
+        track->unk_3A++;
+        track->cmdPtr -= 2;
+        track->wai = 1;
+    }
+    else
+    {
+        track->unk_3A = 0;
+        track->cmdPtr += 2;
+    }
+}
+
+void ply_xcmd_0D(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 unk;
+
+    READ_XCMD_BYTE(unk, 0) // UB: uninitialized variable
+    READ_XCMD_BYTE(unk, 1)
+    READ_XCMD_BYTE(unk, 2)
+    READ_XCMD_BYTE(unk, 3)
+
+    track->unk_3C = unk;
+    track->cmdPtr += 4;
+}
+
+void DummyFunc(void)
+{
+}
+
+struct MusicPlayerInfo *sub_81DF43C(u32 tone)
+{
+    u32 maxClock = 0;
+    s32 maxClockIndex = 0;
+    s32 i;
+    struct MusicPlayerInfo *mplayInfo;
+
+    for (i = 0; i < MAX_POKEMON_CRIES; i++)
+    {
+        struct MusicPlayerTrack *track = &gPokemonCryTracks[i * 2];
+
+        if (!track->flags && (!track->chan || track->chan->track != track))
+            goto start_song;
+
+        if (maxClock < gPokemonCryMusicPlayers[i].clock)
+        {
+            maxClock = gPokemonCryMusicPlayers[i].clock;
+            maxClockIndex = i;
+        }
+    }
+
+    i = maxClockIndex;
+
+start_song:
+    mplayInfo = &gPokemonCryMusicPlayers[i];
+    mplayInfo->ident++;
+
+#define CRY ((s32)&gPokemonCrySongs + i * sizeof(struct PokemonCrySong))
+#define CRY_OFS(field) offsetof(struct PokemonCrySong, field)
+
+    memcpy((void *)CRY, &gPokemonCrySong, sizeof(struct PokemonCrySong));
+
+    *(u32 *)(CRY + CRY_OFS(tone)) = tone;
+    *(u32 *)(CRY + CRY_OFS(part)) = CRY + CRY_OFS(part0);
+    *(u32 *)(CRY + CRY_OFS(part) + 4) = CRY + CRY_OFS(part1);
+    *(u32 *)(CRY + CRY_OFS(gotoTarget)) = CRY + CRY_OFS(cont);
+
+#undef CRY_OFS
+#undef CRY
+
+    mplayInfo->ident = ID_NUMBER;
+
+    MPlayStart(mplayInfo, (struct SongHeader *)(&gPokemonCrySongs[i]));
+
+    return mplayInfo;
+}
+
+void sub_81DF50C(u8 val)
+{
+    gPokemonCrySong.volumeValue = val & 0x7F;
+}
+
+void sub_81DF520(s8 val)
+{
+    gPokemonCrySong.panValue = (val + C_V) & 0x7F;
+}
+
+void sub_81DF538(s16 val)
+{
+    s16 b = val + 0x80;
+    u8 a = gPokemonCrySong.tuneValue2 - gPokemonCrySong.tuneValue;
+    gPokemonCrySong.tieKeyValue = (b >> 8) & 0x7F;
+    gPokemonCrySong.tuneValue = (b >> 1) & 0x7F;
+    gPokemonCrySong.tuneValue2 = (a + ((b >> 1) & 0x7F)) & 0x7F;
+}
+
+void sub_81DF570(u16 val)
+{
+    gPokemonCrySong.unkCmd0CParam = val;
+}
+
+void sub_81DF57C(u8 val)
+{
+    gPokemonCrySong.releaseValue = val;
+}
+
+void sub_81DF588(u32 val)
+{
+    gPokemonCrySong.unkCmd0DParam = val;
+}
+
+int sub_81DF594(struct MusicPlayerInfo *mplayInfo)
+{
+    struct MusicPlayerTrack *track = mplayInfo->tracks;
+
+    if (track->chan && track->chan->track == track)
+        return 1;
+    else
+        return 0;
+}
+
+void sub_81DF5AC(s8 val)
+{
+    if (val)
+    {
+        gPokemonCrySong.trackCount = 2;
+        gPokemonCrySong.tuneValue2 = (val + gPokemonCrySong.tuneValue) & 0x7F;
+    }
+    else
+    {
+        gPokemonCrySong.trackCount = 1;
+    }
+}
+
+void sub_81DF5D8(u32 val)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    if (val)
+    {
+        REG_SOUNDCNT_H = SOUND_B_TIMER_0 | SOUND_B_LEFT_OUTPUT
+                       | SOUND_A_TIMER_0 | SOUND_A_RIGHT_OUTPUT
+                       | SOUND_ALL_MIX_FULL;
+        soundInfo->mode &= ~1;
+    }
+    else
+    {
+        REG_SOUNDCNT_H = SOUND_B_TIMER_0 | SOUND_B_LEFT_OUTPUT | SOUND_B_RIGHT_OUTPUT
+                       | SOUND_A_TIMER_0 | SOUND_A_LEFT_OUTPUT | SOUND_A_RIGHT_OUTPUT
+                       | SOUND_B_MIX_HALF | SOUND_A_MIX_HALF | SOUND_CGB_MIX_FULL;
+        soundInfo->mode |= 1;
+    }
+}
+
+void sub_81DF618(u8 val)
+{
+    gPokemonCrySong.priority = val;
+}
diff --git a/src/m4a_tables.c b/src/m4a_tables.c
new file mode 100644
index 000000000..39344a590
--- /dev/null
+++ b/src/m4a_tables.c
@@ -0,0 +1,306 @@
+#include "gba/m4a_internal.h"
+
+// Some of these functions have different signatures, so we need to make this
+// an array of void pointers or a struct. It's simpler to just make it an array
+// for now.
+void * const gMPlayJumpTableTemplate[] =
+{
+    ply_fine,
+    ply_goto,
+    ply_patt,
+    ply_pend,
+    ply_rept,
+    ply_fine,
+    ply_fine,
+    ply_fine,
+    ply_fine,
+    ply_prio,
+    ply_tempo,
+    ply_keysh,
+    ply_voice,
+    ply_vol,
+    ply_pan,
+    ply_bend,
+    ply_bendr,
+    ply_lfos,
+    ply_lfodl,
+    ply_mod,
+    ply_modt,
+    ply_fine,
+    ply_fine,
+    ply_tune,
+    ply_fine,
+    ply_fine,
+    ply_fine,
+    ply_port,
+    ply_fine,
+    ply_endtie,
+    SampleFreqSet,
+    TrackStop,
+    FadeOutBody,
+    TrkVolPitSet,
+    RealClearChain,
+    SoundMainBTM,
+};
+
+const u8 gUnknown_0842F9F4[] =
+{
+    0,
+    1,
+    4,
+    9,
+    16,
+    25,
+    36,
+    49,
+    192,
+    207,
+    220,
+    231,
+    240,
+    247,
+    252,
+    255,
+};
+
+const u8 gScaleTable[] =
+{
+    0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB,
+    0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB,
+    0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB,
+    0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB,
+    0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB,
+    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B,
+    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B,
+    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B,
+    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B,
+    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B,
+    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B,
+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
+    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B,
+    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
+};
+
+const u32 gFreqTable[] =
+{
+    2147483648u,
+    2275179671u,
+    2410468894u,
+    2553802834u,
+    2705659852u,
+    2866546760u,
+    3037000500u,
+    3217589947u,
+    3408917802u,
+    3611622603u,
+    3826380858u,
+    4053909305u,
+};
+
+const u16 gPcmSamplesPerVBlankTable[] =
+{
+    96,
+    132,
+    176,
+    224,
+    264,
+    304,
+    352,
+    448,
+    528,
+    608,
+    672,
+    704,
+};
+
+const u8 gCgbScaleTable[] =
+{
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
+    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
+    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B,
+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
+    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B,
+    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B,
+    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B,
+    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B,
+    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B,
+    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B,
+    0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB,
+};
+
+const s16 gCgbFreqTable[] =
+{
+    -2004,
+    -1891,
+    -1785,
+    -1685,
+    -1591,
+    -1501,
+    -1417,
+    -1337,
+    -1262,
+    -1192,
+    -1125,
+    -1062,
+};
+
+const u8 gNoiseTable[] =
+{
+    0xD7, 0xD6, 0xD5, 0xD4,
+    0xC7, 0xC6, 0xC5, 0xC4,
+    0xB7, 0xB6, 0xB5, 0xB4,
+    0xA7, 0xA6, 0xA5, 0xA4,
+    0x97, 0x96, 0x95, 0x94,
+    0x87, 0x86, 0x85, 0x84,
+    0x77, 0x76, 0x75, 0x74,
+    0x67, 0x66, 0x65, 0x64,
+    0x57, 0x56, 0x55, 0x54,
+    0x47, 0x46, 0x45, 0x44,
+    0x37, 0x36, 0x35, 0x34,
+    0x27, 0x26, 0x25, 0x24,
+    0x17, 0x16, 0x15, 0x14,
+    0x07, 0x06, 0x05, 0x04,
+    0x03, 0x02, 0x01, 0x00,
+};
+
+const u8 gCgb3Vol[] =
+{
+    0x00, 0x00,
+    0x60, 0x60, 0x60, 0x60,
+    0x40, 0x40, 0x40, 0x40,
+    0x80, 0x80, 0x80, 0x80,
+    0x20, 0x20,
+};
+
+const u8 gClockTable[] =
+{
+    0x00,
+    0x01,
+    0x02,
+    0x03,
+    0x04,
+    0x05,
+    0x06,
+    0x07,
+    0x08,
+    0x09,
+    0x0A,
+    0x0B,
+    0x0C,
+    0x0D,
+    0x0E,
+    0x0F,
+    0x10,
+    0x11,
+    0x12,
+    0x13,
+    0x14,
+    0x15,
+    0x16,
+    0x17,
+    0x18,
+    0x1C,
+    0x1E,
+    0x20,
+    0x24,
+    0x28,
+    0x2A,
+    0x2C,
+    0x30,
+    0x34,
+    0x36,
+    0x38,
+    0x3C,
+    0x40,
+    0x42,
+    0x44,
+    0x48,
+    0x4C,
+    0x4E,
+    0x50,
+    0x54,
+    0x58,
+    0x5A,
+    0x5C,
+    0x60,
+};
+
+#define FINE   0xb1
+#define GOTO   0xb2
+#define PATT   0xb3
+#define PEND   0xb4
+#define REPT   0xb5
+#define MEMACC 0xb9
+#define PRIO   0xba
+#define TEMPO  0xbb
+#define KEYSH  0xbc
+#define VOICE  0xbd
+#define VOL    0xbe
+#define PAN    0xbf
+#define BEND   0xc0
+#define BENDR  0xc1
+#define LFOS   0xc2
+#define LFODL  0xc3
+#define MOD    0xc4
+#define MODT   0xc5
+#define TUNE   0xc8
+
+#define XCMD   0xcd
+#define xRELE  0x07
+#define xIECV  0x08
+#define xIECL  0x09
+
+#define EOT    0xce
+#define TIE    0xcf
+
+const struct PokemonCrySong gPokemonCrySongTemplate =
+{
+    1, // track count
+    0, // block count
+    255, // priority
+    0, // reverb
+    (struct ToneData *)&gUnknown_0842FC88,
+    NULL,
+    NULL,
+    0,
+    TUNE, // part 0
+    C_V, // TUNE value
+    GOTO,
+    0, // GOTO target address
+    TUNE, // part 1
+    C_V + 16, // TUNE value
+    {VOICE, 0}, // part 0 jumps here with GOTO
+    VOL,
+    127, // volume
+    {XCMD, 0x0D},
+    0, // unk value
+    {XCMD, xRELE},
+    0, // release
+    PAN,
+    C_V, // PAN value
+    TIE,
+    60, // TIE key (default is Cn3)
+    127, // TIE velocity
+    {XCMD, 0x0C},
+    60, // unk value
+    {EOT, FINE} // end
+};
+
+const XcmdFunc gXcmdTable[] =
+{
+    ply_xxx,
+    ply_xwave,
+    ply_xtype,
+    ply_xxx,
+    ply_xatta,
+    ply_xdeca,
+    ply_xsust,
+    ply_xrele,
+    ply_xiecv,
+    ply_xiecl,
+    ply_xleng,
+    ply_xswee,
+    ply_xcmd_0C,
+    ply_xcmd_0D,
+};
diff --git a/src/siirtc.c b/src/siirtc.c
index 326f714cc..647042dbe 100644
--- a/src/siirtc.c
+++ b/src/siirtc.c
@@ -52,7 +52,8 @@
 
 extern vu16 GPIOPortDirection;
 
-extern bool8 gSiiRtcLocked;
+static u16 sUnused;
+static bool8 sLocked;
 
 static int WriteCommand(u8 value);
 static int WriteData(u8 value);
@@ -65,13 +66,13 @@ static const char AgbLibRtcVersion[] = "SIIRTC_V001";
 void SiiRtcUnprotect()
 {
     EnableGpioPortRead();
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 }
 
 void SiiRtcProtect()
 {
     DisableGpioPortRead();
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 }
 
 u8 SiiRtcProbe()
@@ -120,10 +121,10 @@ bool8 SiiRtcReset()
     u8 result;
     struct SiiRtcInfo rtc;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -135,7 +136,7 @@ bool8 SiiRtcReset()
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     rtc.status = SIIRTCINFO_24HOUR;
 
@@ -148,10 +149,10 @@ bool8 SiiRtcGetStatus(struct SiiRtcInfo *rtc)
 {
     u8 statusData;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -172,7 +173,7 @@ bool8 SiiRtcGetStatus(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }
@@ -181,10 +182,10 @@ bool8 SiiRtcSetStatus(struct SiiRtcInfo *rtc)
 {
     u8 statusData;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -203,7 +204,7 @@ bool8 SiiRtcSetStatus(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }
@@ -212,10 +213,10 @@ bool8 SiiRtcGetDateTime(struct SiiRtcInfo *rtc)
 {
     u8 i;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -234,7 +235,7 @@ bool8 SiiRtcGetDateTime(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }
@@ -243,10 +244,10 @@ bool8 SiiRtcSetDateTime(struct SiiRtcInfo *rtc)
 {
     u8 i;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -261,7 +262,7 @@ bool8 SiiRtcSetDateTime(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }
@@ -270,10 +271,10 @@ bool8 SiiRtcGetTime(struct SiiRtcInfo *rtc)
 {
     u8 i;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -292,7 +293,7 @@ bool8 SiiRtcGetTime(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }
@@ -301,10 +302,10 @@ bool8 SiiRtcSetTime(struct SiiRtcInfo *rtc)
 {
     u8 i;
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 5;
@@ -319,7 +320,7 @@ bool8 SiiRtcSetTime(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }
@@ -329,10 +330,10 @@ bool8 SiiRtcSetAlarm(struct SiiRtcInfo *rtc)
     u8 i;
     u8 alarmData[2];
 
-    if (gSiiRtcLocked == TRUE)
+    if (sLocked == TRUE)
         return FALSE;
 
-    gSiiRtcLocked = TRUE;
+    sLocked = TRUE;
 
     // Decode BCD.
     alarmData[0] = (rtc->alarmHour & 0xF) + 10 * ((rtc->alarmHour >> 4) & 0xF);
@@ -359,7 +360,7 @@ bool8 SiiRtcSetAlarm(struct SiiRtcInfo *rtc)
     GPIO_PORT_DATA = 1;
     GPIO_PORT_DATA = 1;
 
-    gSiiRtcLocked = FALSE;
+    sLocked = FALSE;
 
     return TRUE;
 }