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-rw-r--r--macros/sound.asm2
1 files changed, 1 insertions, 1 deletions
diff --git a/macros/sound.asm b/macros/sound.asm
index 49eb30d6b..a0eacc1e0 100644
--- a/macros/sound.asm
+++ b/macros/sound.asm
@@ -70,7 +70,7 @@ soundinput: macro
enum sound_duty_cmd
sound_duty: macro
db sound_duty_cmd
- db \1 ; unknown
+ db \1 | (\2 << 2) | (\3 << 4) | (\4 << 6) ; duty sequence
endm
enum togglesfx_cmd