diff --git a/src/audio.h b/src/audio.h
index 35f9fbe8e5..125e3a586e 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -107,8 +107,11 @@ typedef u8* WaveData;
 #define MUS_QUEUE_SIZE 16
 #define SFX_QUEUE_SIZE 16
 
-#define AU_SEMITONE 100 // cents
-#define AU_OCTAVE (12 * AU_SEMITONE)
+// semitone pitch interval in cents
+#define AU_SEMITONE_CENTS 100
+
+// octave pitch interval in cents
+#define AU_OCTAVE_CENTS (12 * AU_SEMITONE_CENTS)
 
 #define ENV_VOL_MAX     0x80    // for 7-bit volumes, 128 (1 << 7) represents full volume
 #define ENV_VOL_SHIFT   7       // Shift required to divide by 128 (normalize 7-bit volumes after a multiply)
@@ -444,7 +447,7 @@ typedef union SeqArgs {
         u8 value;
     } TrackVolume;
     struct { // cmd ED
-        s8 cent;
+        s8 semitone;
     } InstrumentCoarseTune;
     struct { // cmd EE
         s8 cent;
diff --git a/src/audio/bgm_player.c b/src/audio/bgm_player.c
index 3c8580eda3..8b221478f5 100644
--- a/src/audio/bgm_player.c
+++ b/src/audio/bgm_player.c
@@ -1652,7 +1652,7 @@ void au_BGMCmd_EC_TrackVolume(BGMPlayer* player, BGMPlayerTrack* track) {
 }
 
 void au_BGMCmd_ED_InstrumentCoarseTune(BGMPlayer* player, BGMPlayerTrack* track) {
-    track->insCoarseDetune = player->seqCmdArgs.InstrumentCoarseTune.cent * 100;
+    track->insCoarseDetune = player->seqCmdArgs.InstrumentCoarseTune.semitone * AU_SEMITONE_CENTS;
 }
 
 void au_BGMCmd_EE_InstrumentFineTune(BGMPlayer* player, BGMPlayerTrack* track) {
@@ -1720,7 +1720,7 @@ void au_BGMCmd_F5_UseInstrument(BGMPlayer* player, BGMPlayerTrack* track) {
     track->insVolume = volume;
     track->insPan = instrument->pan & 0x7F;
     track->insReverb = instrument->reverb & 0x7F;
-    track->insCoarseDetune = instrument->coarseTune * 100;
+    track->insCoarseDetune = instrument->coarseTune * AU_SEMITONE_CENTS;
     track->insFineDetune = instrument->fineTune;
     track->changed.all |= 0x10101; // volume, pan, and reverb
 }
@@ -2014,10 +2014,10 @@ void au_bgm_set_playback_rate(BGMPlayer* player, f32 rate) {
 }
 
 void au_bgm_player_set_detune(BGMPlayer* player, s32 detune) {
-    if (detune > AU_OCTAVE) {
-        detune = AU_OCTAVE;
-    } else if (detune < -2 * AU_OCTAVE) {
-        detune = -2 * AU_OCTAVE;
+    if (detune > AU_OCTAVE_CENTS) {
+        detune = AU_OCTAVE_CENTS;
+    } else if (detune < -2 * AU_OCTAVE_CENTS) {
+        detune = -2 * AU_OCTAVE_CENTS;
     }
 
     player->detune = detune;
diff --git a/src/audio/snd_interface.c b/src/audio/snd_interface.c
index fa2b2baaed..ce865e8b1d 100644
--- a/src/audio/snd_interface.c
+++ b/src/audio/snd_interface.c
@@ -221,10 +221,10 @@ void snd_start_sound_with_shift(s32 soundID, u8 volume, u8 pan, s16 pitchShift)
         pan = AU_PAN_MAX;
     }
 
-    if (pitchShift > 2 * AU_OCTAVE) {
-        pitchShift = 2 * AU_OCTAVE;
-    } else if (pitchShift < -2 * AU_OCTAVE) {
-        pitchShift = -2 * AU_OCTAVE;
+    if (pitchShift > 2 * AU_OCTAVE_CENTS) {
+        pitchShift = 2 * AU_OCTAVE_CENTS;
+    } else if (pitchShift < -2 * AU_OCTAVE_CENTS) {
+        pitchShift = -2 * AU_OCTAVE_CENTS;
     }
 
     au_sfx_enqueue_event(soundManager, soundID, vol, pitchShift, pan);
@@ -257,10 +257,10 @@ void snd_adjust_sound_with_shift(s32 soundID, u8 volume, u8 pan, s16 pitchShift)
         pan = AU_PAN_MAX;
     }
 
-    if (pitchShift > 2 * AU_OCTAVE) {
-        pitchShift = 2 * AU_OCTAVE;
-    } else if (pitchShift < -2 * AU_OCTAVE) {
-        pitchShift = -2 * AU_OCTAVE;
+    if (pitchShift > 2 * AU_OCTAVE_CENTS) {
+        pitchShift = 2 * AU_OCTAVE_CENTS;
+    } else if (pitchShift < -2 * AU_OCTAVE_CENTS) {
+        pitchShift = -2 * AU_OCTAVE_CENTS;
     }
 
     au_sfx_enqueue_event(soundManager, soundID | SOUND_ID_ADJUST, vol, pitchShift, pan);