Merge pull request #3 from camthesaxman/headers

move all externs to header files and update m4a library

8 files changed, 1793 insertions, 1557 deletions

diff --git a/src/gbplayer.c b/src/gbplayer.c
index 5e4ad19..00d30d5 100755
--- a/src/gbplayer.c
+++ b/src/gbplayer.c
@@ -2,18 +2,6 @@
 #include "gbplayer.h"
 #include "main.h"
 
-extern void sub_1340(void);
-extern void sub_13FC(void);
-extern void sub_1828(void);
-extern u8 gUnknown_02002808[];
-extern u16 sGbPlayerCurKeys;
-extern u16 sGbPlayerPrevKeys;
-extern const u8 gUnknown_08058048[];
-extern const u8 gUnknown_08058248[];
-extern const u8 gUnknown_0805C248[];
-
-extern const int *gUnknown_086A4C44[];
-
 /*static*/ void ReadGbPlayerKeys(void)
 {
     u16 keyInput = REG_KEYINPUT ^ KEYS_MASK;
diff --git a/src/m4a.c b/src/m4a.c
new file mode 100755
index 0000000..2c70083
--- /dev/null
+++ b/src/m4a.c
@@ -0,0 +1,1791 @@
+#include <string.h>
+#include "gba/m4a_internal.h"
+
+extern const u8 gCgb3Vol[];
+
+#define BSS_CODE __attribute__((section(".bss.code")))
+
+asm(".set gScaleTable, 0x0852D928"); // TODO:
+asm(".set gFreqTable,  0x0852D9DC"); // TODO:
+asm(".set gMPlayTable, 0x08534DD4"); // TODO:
+asm(".set gPokemonCrySongTemplate, 0x0852DB40"); // TODO:
+asm(".set gSongTable,  0x08534E04"); // TODO:
+asm(".set gMaxLines,   0x3C"); // TODO:
+asm(".set gPcmSamplesPerVBlankTable, 0x0852DA0C"); // TODO:
+asm(".set gNoiseTable, 0x0852DAC0"); // TODO:
+asm(".set gCgbScaleTable, 0x0852DA24"); // TODO:
+asm(".set gCgbFreqTable,  0x0852DAA8"); // TODO:
+asm(".set gNumMusicPlayers, 0x4"); // TODO:
+asm(".set gCgb3Vol, 0x0852DAFC");  // TODO:
+asm(".set gXcmdTable, 0x0852DB74");  // TODO:
+
+BSS_CODE ALIGNED(4) char SoundMainRAM_Buffer[0x800] = {0};
+
+struct SoundInfo gSoundInfo;
+struct PokemonCrySong gPokemonCrySongs[MAX_POKEMON_CRIES];
+struct MusicPlayerInfo gPokemonCryMusicPlayers[MAX_POKEMON_CRIES];
+void *gMPlayJumpTable[36];
+struct CgbChannel gCgbChans[4];
+struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2];
+struct PokemonCrySong gPokemonCrySong;
+struct MusicPlayerInfo gMPlayInfo_BGM;
+struct MusicPlayerInfo gMPlayInfo_SE1;
+struct MusicPlayerInfo gMPlayInfo_SE2;
+u8 gMPlayMemAccArea[0x10];
+
+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)
+{
+}
+
+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
+               | (14 << SOUND_MODE_MASVOL_SHIFT)
+               | (6 << 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 m4aMPlayFadeOutTemporarily(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT) | TEMPORARY_FADE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayFadeIn(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;
+
+    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;
+    soundInfo->maxLines = MAX_LINES;
+
+    CpuFill32(0, cgbChans, 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(0, soundInfo, 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(0, soundInfo->pcmBuffer, 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");
+                u32 val;
+
+                TrackStop(mplayInfo, track);
+
+                val = TEMPORARY_FADE;
+                fadeOV = mplayInfo->fadeOV;
+                val &= fadeOV;
+
+                if (!val)
+                    track->flags = 0;
+
+                i--;
+                track++;
+            }
+
+            if (mplayInfo->fadeOV & TEMPORARY_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;
+        s32 x = (track->tune + bend)
+              * 4
+              + (track->keyShift << 8)
+              + (track->keyShiftX << 8)
+              + 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;
+}
+
+void CgbSound(void)
+{
+    s32 ch;
+    struct CgbChannel *channels;
+    s32 evAdd;
+    s32 prevC15;
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    vu8 *nrx0ptr;
+    vu8 *nrx1ptr;
+    vu8 *nrx2ptr;
+    vu8 *nrx3ptr;
+    vu8 *nrx4ptr;
+
+    // Most comparision operations that cast to s8 perform 'and' by 0xFF.
+    int mask = 0xff;
+
+    if (soundInfo->c15)
+        soundInfo->c15--;
+    else
+        soundInfo->c15 = 14;
+
+    for (ch = 1, channels = soundInfo->cgbChans; ch <= 4; ch++, channels++)
+    {
+        if (!(channels->sf & 0xc7))
+            continue;
+
+        switch (ch)
+        {
+        case 1:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR10);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR11);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR12);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR13);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR14);
+            break;
+        case 2:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR10+1);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR21);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR22);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR23);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR24);
+            break;
+        case 3:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR30);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR31);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR32);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR33);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR34);
+            break;
+        default:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR30+1);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR41);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR42);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR43);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR44);
+            break;
+        }
+
+        prevC15 = soundInfo->c15;
+        evAdd = *nrx2ptr;
+
+        if (channels->sf & 0x80)
+        {
+            if (!(channels->sf & 0x40))
+            {
+                channels->sf = 3;
+                channels->mo = 3;
+                CgbModVol(channels);
+                switch (ch)
+                {
+                case 1:
+                    *nrx0ptr = channels->sw;
+                    // fallthrough
+                case 2:
+                    *nrx1ptr = ((u32)channels->wp << 6) + channels->le;
+                    goto loc_82E0E30;
+                case 3:
+                    if ((u32)channels->wp != channels->cp)
+                    {
+                        *nrx0ptr = 0x40;
+                        REG_WAVE_RAM0 = channels->wp[0];
+                        REG_WAVE_RAM1 = channels->wp[1];
+                        REG_WAVE_RAM2 = channels->wp[2];
+                        REG_WAVE_RAM3 = channels->wp[3];
+                        channels->cp = (u32)channels->wp;
+                    }
+                    *nrx0ptr = 0;
+                    *nrx1ptr = channels->le;
+                    if (channels->le)
+                        channels->n4 = -64;
+                    else
+                        channels->n4 = -128;
+                    break;
+                default:
+                    *nrx1ptr = channels->le;
+                    *nrx3ptr = (u32)channels->wp << 3;
+                loc_82E0E30:
+                    evAdd = channels->at + 8;
+                    if (channels->le)
+                        channels->n4 = 64;
+                    else
+                        channels->n4 = 0;
+                    break;
+                }
+                channels->ec = channels->at;
+                if ((s8)(channels->at & mask))
+                {
+                    channels->ev = 0;
+                    goto EC_MINUS;
+                }
+                else
+                {
+                    goto loc_82E0F96;
+                }
+            }
+            else
+            {
+                goto loc_82E0E82;
+            }
+        }
+        else if (channels->sf & 0x04)
+        {
+            channels->echoLength--;
+            if ((s8)(channels->echoLength & mask) <= 0)
+            {
+            loc_82E0E82:
+                CgbOscOff(ch);
+                channels->sf = 0;
+                goto LAST_LABEL;
+            }
+            goto loc_82E0FD6;
+        }
+        else if ((channels->sf & 0x40) && (channels->sf & 0x03))
+        {
+            channels->sf &= 0xfc;
+            channels->ec = channels->re;
+            if ((s8)(channels->re & mask))
+            {
+                channels->mo |= 1;
+                if (ch != 3)
+                {
+                    evAdd = channels->re;
+                }
+                goto EC_MINUS;
+            }
+            else
+            {
+                goto loc_82E0F02;
+            }
+        }
+        else
+        {
+        loc_82E0ED0:
+            if (channels->ec == 0)
+            {
+                if (ch == 3)
+                {
+                    channels->mo |= 1;
+                }
+                CgbModVol(channels);
+                if ((channels->sf & 0x3) == 0)
+                {
+                    channels->ev--;
+                    if ((s8)(channels->ev & mask) <= 0)
+                    {
+                    loc_82E0F02:
+                        channels->ev = ((channels->eg * channels->echoVolume) + 0xFF) >> 8;
+                        if (channels->ev)
+                        {
+                            channels->sf |= 0x4;
+                            channels->mo |= 1;
+                            if (ch != 3)
+                            {
+                                evAdd = 8;
+                            }
+                            goto loc_82E0FD6;
+                        }
+                        else
+                        {
+                            goto loc_82E0E82;
+                        }
+                    }
+                    else
+                    {
+                        channels->ec = channels->re;
+                    }
+                }
+                else if ((channels->sf & 0x3) == 1)
+                {
+                loc_82E0F3A:
+                    channels->ev = channels->sg;
+                    channels->ec = 7;
+                }
+                else if ((channels->sf & 0x3) == 2)
+                {
+                    int ev, sg;
+
+                    channels->ev--;
+                    ev = (s8)(channels->ev & mask);
+                    sg = (s8)(channels->sg);
+                    if (ev <= sg)
+                    {
+                    loc_82E0F5A:
+                        if (channels->su == 0)
+                        {
+                            channels->sf &= 0xfc;
+                            goto loc_82E0F02;
+                        }
+                        else
+                        {
+                            channels->sf--;
+                            channels->mo |= 1;
+                            if (ch != 3)
+                            {
+                                evAdd = 8;
+                            }
+                            goto loc_82E0F3A;
+                        }
+                    }
+                    else
+                    {
+                        channels->ec = channels->de;
+                    }
+                }
+                else
+                {
+                    channels->ev++;
+                    if ((u8)(channels->ev & mask) >= channels->eg)
+                    {
+                    loc_82E0F96:
+                        channels->sf--;
+                        channels->ec = channels->de;
+                        if ((u8)(channels->ec & mask))
+                        {
+                            channels->mo |= 1;
+                            channels->ev = channels->eg;
+                            if (ch != 3)
+                            {
+                                evAdd = channels->de;
+                            }
+                        }
+                        else
+                        {
+                            goto loc_82E0F5A;
+                        }
+                    }
+                    else
+                    {
+                        channels->ec = channels->at;
+                    }
+                }
+            }
+        }
+
+    EC_MINUS:
+        channels->ec--;
+        if (prevC15 == 0)
+        {
+            prevC15--;
+            goto loc_82E0ED0;
+        }
+
+    loc_82E0FD6:
+        if (channels->mo & 0x2)
+        {
+            if (ch < 4 && (channels->ty & 0x08))
+            {
+                int biasH = REG_SOUNDBIAS_H;
+
+                if (biasH < 64)
+                {
+                    channels->fr = (channels->fr + 2) & 0x7fc;
+                }
+                else if (biasH < 128)
+                {
+                    channels->fr = (channels->fr + 1) & 0x7fe;
+                }
+            }
+            if (ch != 4)
+            {
+                *nrx3ptr = channels->fr;
+            }
+            else
+            {
+                *nrx3ptr = (*nrx3ptr & 0x08) | channels->fr;
+            }
+            channels->n4 = (channels->n4 & 0xC0) + (*((u8*)(&channels->fr) + 1));
+            *nrx4ptr = (s8)(channels->n4 & mask);
+        }
+
+        if (channels->mo & 1)
+        {
+            REG_NR51 = (REG_NR51 & ~channels->panMask) | channels->pan;
+            if (ch == 3)
+            {
+                *nrx2ptr = gCgb3Vol[channels->ev];
+                if (channels->n4 & 0x80)
+                {
+                    *nrx0ptr = 0x80;
+                    *nrx4ptr = channels->n4;
+                    channels->n4 &= 0x7f;
+                }
+            }
+            else
+            {
+                evAdd &= 0xf;
+                *nrx2ptr = (channels->ev << 4) + evAdd;
+                *nrx4ptr = channels->n4 | 0x80;
+                if (ch == 1 && !(*nrx0ptr & 0x08))
+                {
+                    *nrx4ptr = channels->n4 | 0x80;
+                }
+            }
+        }
+
+    LAST_LABEL:
+        channels->mo = 0;
+    }
+}
+
+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, s16 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 = 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->wait = 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 *SetPokemonCryTone(struct ToneData *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)) = (u32)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 SetPokemonCryVolume(u8 val)
+{
+    gPokemonCrySong.volumeValue = val & 0x7F;
+}
+
+void SetPokemonCryPanpot(s8 val)
+{
+    gPokemonCrySong.panValue = (val + C_V) & 0x7F;
+}
+
+void SetPokemonCryPitch(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 SetPokemonCryLength(u16 val)
+{
+    gPokemonCrySong.unkCmd0CParam = val;
+}
+
+void SetPokemonCryRelease(u8 val)
+{
+    gPokemonCrySong.releaseValue = val;
+}
+
+void SetPokemonCryProgress(u32 val)
+{
+    gPokemonCrySong.unkCmd0DParam = val;
+}
+
+int IsPokemonCryPlaying(struct MusicPlayerInfo *mplayInfo)
+{
+    struct MusicPlayerTrack *track = mplayInfo->tracks;
+
+    if (track->chan && track->chan->track == track)
+        return 1;
+    else
+        return 0;
+}
+
+void SetPokemonCryChorus(s8 val)
+{
+    if (val)
+    {
+        gPokemonCrySong.trackCount = 2;
+        gPokemonCrySong.tuneValue2 = (val + gPokemonCrySong.tuneValue) & 0x7F;
+    }
+    else
+    {
+        gPokemonCrySong.trackCount = 1;
+    }
+}
+
+void SetPokemonCryStereo(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 SetPokemonCryPriority(u8 val)
+{
+    gPokemonCrySong.priority = val;
+}
diff --git a/src/m4a_2.c b/src/m4a_2.c
deleted file mode 100755
index 0dc5f6c..0000000
--- a/src/m4a_2.c
+++ /dev/null
@@ -1,931 +0,0 @@
-#include "gba/m4a_internal.h"
-
-// #define BSS_CODE __attribute__((section(".bss.code")))
-
-asm(".set gScaleTable, 0x0852D928"); // TODO:
-asm(".set gFreqTable,  0x0852D9DC"); // TODO:
-asm(".set gMPlayTable, 0x08534DD4"); // TODO:
-asm(".set gPokemonCrySongTemplate, 0x0852DB40"); // TODO:
-asm(".set gSongTable,  0x08534E04"); // TODO:
-asm(".set gMaxLines,   0x3C"); // TODO:
-asm(".set gPcmSamplesPerVBlankTable, 0x0852DA0C"); // TODO:
-asm(".set gNoiseTable, 0x0852DAC0"); // TODO:
-asm(".set gCgbScaleTable, 0x0852DA24"); // TODO:
-asm(".set gCgbFreqTable,  0x0852DAA8"); // TODO:
-asm(".set gNumMusicPlayers, 0x4"); // TODO:
-
-extern char SoundMainRAM_Buffer[0x800];
-extern struct SoundInfo gSoundInfo;
-extern struct MusicPlayerInfo gPokemonCryMusicPlayers[MAX_POKEMON_CRIES];
-extern void *gMPlayJumpTable[36];
-extern struct CgbChannel gCgbChans[4];
-extern struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2];
-extern struct PokemonCrySong gPokemonCrySong;
-extern u8 gMPlayMemAccArea[0x10];
-
-// BSS_CODE ALIGNED(4) char SoundMainRAM_Buffer[0x800] = {0};
-// struct PokemonCrySong gPokemonCrySongs[MAX_POKEMON_CRIES];
-// struct MusicPlayerInfo gPokemonCryMusicPlayers[MAX_POKEMON_CRIES];
-// void *gMPlayJumpTable[36];
-// struct CgbChannel gCgbChans[4];
-// struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2];
-// struct PokemonCrySong gPokemonCrySong;
-// struct MusicPlayerInfo gMPlayInfo_BGM;
-// struct MusicPlayerInfo gMPlayInfo_SE1;
-// struct MusicPlayerInfo gMPlayInfo_SE2;
-// struct MusicPlayerInfo gMPlayInfo_SE3;
-// u8 gMPlayMemAccArea[0x10];
-
-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
-               | (14 << SOUND_MODE_MASVOL_SHIFT)
-               | (6 << 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 m4aMPlayFadeOutTemporarily(struct MusicPlayerInfo *mplayInfo, u16 speed)
-{
-    if (mplayInfo->ident == ID_NUMBER)
-    {
-        mplayInfo->ident++;
-        mplayInfo->fadeOC = speed;
-        mplayInfo->fadeOI = speed;
-        mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT) | TEMPORARY_FADE;
-        mplayInfo->ident = ID_NUMBER;
-    }
-}
-
-void m4aMPlayFadeIn(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;
-
-    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;
-    soundInfo->maxLines = MAX_LINES;
-
-    CpuFill32(0, cgbChans, 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(0, soundInfo, 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(0, soundInfo->pcmBuffer, 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");
-                u32 val;
-
-                TrackStop(mplayInfo, track);
-
-                val = TEMPORARY_FADE;
-                fadeOV = mplayInfo->fadeOV;
-                val &= fadeOV;
-
-                if (!val)
-                    track->flags = 0;
-
-                i--;
-                track++;
-            }
-
-            if (mplayInfo->fadeOV & TEMPORARY_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
deleted file mode 100755
index 32f7a29..0000000
--- a/src/m4a_4.c
+++ /dev/null
@@ -1,548 +0,0 @@
-#include "gba/m4a_internal.h"
-
-asm(".set gXcmdTable, 0x0852DB74"); // TODO:
-asm(".set gPokemonCrySongs, 0x02032AE0"); // TODO:
-
-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, s16 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 = 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->wait = 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 *SetPokemonCryTone(struct ToneData *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)) = (u32)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 SetPokemonCryVolume(u8 val)
-{
-    gPokemonCrySong.volumeValue = val & 0x7F;
-}
-
-void SetPokemonCryPanpot(s8 val)
-{
-    gPokemonCrySong.panValue = (val + C_V) & 0x7F;
-}
-
-void SetPokemonCryPitch(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 SetPokemonCryLength(u16 val)
-{
-    gPokemonCrySong.unkCmd0CParam = val;
-}
-
-void SetPokemonCryRelease(u8 val)
-{
-    gPokemonCrySong.releaseValue = val;
-}
-
-void SetPokemonCryProgress(u32 val)
-{
-    gPokemonCrySong.unkCmd0DParam = val;
-}
-
-int IsPokemonCryPlaying(struct MusicPlayerInfo *mplayInfo)
-{
-    struct MusicPlayerTrack *track = mplayInfo->tracks;
-
-    if (track->chan && track->chan->track == track)
-        return 1;
-    else
-        return 0;
-}
-
-void SetPokemonCryChorus(s8 val)
-{
-    if (val)
-    {
-        gPokemonCrySong.trackCount = 2;
-        gPokemonCrySong.tuneValue2 = (val + gPokemonCrySong.tuneValue) & 0x7F;
-    }
-    else
-    {
-        gPokemonCrySong.trackCount = 1;
-    }
-}
-
-void SetPokemonCryStereo(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 SetPokemonCryPriority(u8 val)
-{
-    gPokemonCrySong.priority = val;
-}
diff --git a/src/main.c b/src/main.c
index 62b6b14..de8d269 100755
--- a/src/main.c
+++ b/src/main.c
@@ -3,23 +3,11 @@
 #include "gbplayer.h"
 #include "m4a.h"
 
-extern void sub_438(void);
-extern void sub_8BC(void);
-extern void sub_8FC(void);
-extern void sub_940(void);
-extern void sub_1F4C(void);
-extern void sub_1F5C(void);
-extern void sub_1090C(void);
-extern void sub_52A18(void);
-
 static void sub_B54(void);
 static void sub_B8C(void);
 static void InitIntrHandlers(void);
 static void ReadKeys(void);
 
-extern const IntrFunc gIntrTableTemplate[14];
-extern const s16 gUnknown_08055C44[];
-
 void AgbMain(void)
 {
     RegisterRamReset(0xFF);
diff --git a/src/rom_850.c b/src/rom_850.c
index 97fed1f..56a4914 100755
--- a/src/rom_850.c
+++ b/src/rom_850.c
@@ -1,16 +1,6 @@
 #include "global.h"
 #include "main.h"
 
-extern IntrFunc *gUnknown_0200FB98;
-extern IntrFunc *gUnknown_02019BE0;
-extern void (*gUnknown_0200FB9C)(void);
-extern void (*gUnknown_0200FBA0)(void);
-extern void (*gUnknown_02017BD0)(void);
-extern void (*gUnknown_02017BD4)(void);
-extern void HBlankIntr(void);
-extern void VCountIntr(void);
-extern void sub_DC4(void);
-
 u16 sub_850(void)
 {
     if (REG_IME & INTR_FLAG_VBLANK
diff --git a/src/titlescreen.c b/src/titlescreen.c
index 315c3e6..b013c2f 100755
--- a/src/titlescreen.c
+++ b/src/titlescreen.c
@@ -3,48 +3,9 @@
 #include "m4a.h"
 #include "main.h"
 
-extern u8 gUnknown_03000000[];
-
-
-extern StateFunc gTitlescreenStateFuncs[];
-extern const u8 gTitlescreenBg_Gfx[];
-extern const u16 gTitlescreenBg_Pals[];
-extern const u8 gTitlescreenBgTilemap[];
-extern const u16 gTitlescreenSprites_Pals[];
-extern const u8 gTitlescreenSpritesSavedGame_Gfx[];
-extern const u8 gTitlescreenSpritesNoSavedGame_Gfx[];
-extern const u8 gGBAButtonIcons_Pals[];
-extern const u8 gOptionsSprites_Gfx[];
-extern const u8 *const gUnknown_086A975C[7];
-extern const u8 *const gUnknown_086A96F8[7];
-extern const s16 gUnknown_086A964C[];
-extern const s8 gUnknown_086A9662[];
-extern const s8 gUnknown_086A9666[6][2];
-extern const s8 gUnknown_086A9748[];
-extern const u8 *const gUnknown_086A9714[];
-extern const u8 *const gUnknown_086A9778[];
-extern const s8 gUnknown_086A9672[9][2];
-extern const u16 gUnknown_086A96A4[];
-extern const u16 gUnknown_086A96D4[];
-extern const s16 gEReaderAccessButtonSequence[];
-extern const struct SpriteSet *const gUnknown_086A96E4[];
-
-extern void sub_438(void);
-extern void sub_CBC(void);
-extern void sub_D10(void);
-extern void sub_FE04(void (*func)(void));
-extern void sub_FD5C(void (*func)(void));
-extern void sub_10708(void*, void*, u16, s16);
-extern void sub_52C44(void);
-
-extern void sub_10AC0(void);
-extern void sub_1175C(void);
-extern void sub_11968(void);
-extern void sub_11B74(void);
-
 static void sub_114FC(void);
 static void sub_1157C(void);
-extern void sub_11640(void);
+/*static*/ extern void sub_11640(void);
 
 // If the user doesn't press any buttons at the title screen,
 // it will transition to a demo gameplay experience.
@@ -208,7 +169,7 @@ void sub_10BB8(void)
             if (gTitlescreen.idleFramesCounter % 10 == 0)
             {
                 gTitlescreen.idleFadeoutCounter++;
-                m4aMPlayVolumeControl(&gMPlayInfo_02032EE0, 0xFFFF, 0x100 / gTitlescreen.idleFadeoutCounter);
+                m4aMPlayVolumeControl(&gMPlayInfo_BGM, 0xFFFF, 0x100 / gTitlescreen.idleFadeoutCounter);
             }
 
             if (gTitlescreen.idleFadeoutCounter > 9)
diff --git a/src/util.c b/src/util.c
index b1af27b..f0d0b05 100755
--- a/src/util.c
+++ b/src/util.c
@@ -1,9 +1,6 @@
 #include "global.h"
 #include "main.h"
 
-extern const struct OamData gEmptyOamData[128];
-extern int sub_55A24(u8*); // Rumble Pak?
-
 static u8 *sub_734(u32, u8*, u32);
 static int sub_780(int, int);