Document File-Select Audio Settings: Sound Modes (#1281)

* Round 1

* Cleanup

* Cleanup

* Space

* More spacing

* Apply -> Set (consistency)

* round 1 pr

* Revert some names

4 files changed, 32 insertions, 23 deletions

diff --git a/src/code/audio_load.c b/src/code/audio_load.c
index 00a246feb..c1ef5b947 100644
--- a/src/code/audio_load.c
+++ b/src/code/audio_load.c
@@ -1168,7 +1168,7 @@ void AudioLoad_Init(void* heap, u32 heapSize) {
     gAudioContext.totalTaskCount = 0;
     gAudioContext.rspTaskIndex = 0;
     gAudioContext.curAiBufIndex = 0;
-    gAudioContext.soundMode = 0;
+    gAudioContext.soundMode = SOUNDMODE_STEREO;
     gAudioContext.curTask = NULL;
     gAudioContext.rspTask[0].task.t.data_size = 0;
     gAudioContext.rspTask[1].task.t.data_size = 0;
diff --git a/src/code/audio_playback.c b/src/code/audio_playback.c
index 8c032b8f2..030b9a888 100644
--- a/src/code/audio_playback.c
+++ b/src/code/audio_playback.c
@@ -30,7 +30,7 @@ void Audio_InitNoteSub(Note* note, NoteSubEu* sub, NoteSubAttributes* attrs) {
     sub->bitField0.stereoStrongLeft = false;
     sub->bitField0.stereoHeadsetEffects = stereoData.stereoHeadsetEffects;
     sub->bitField0.usesHeadsetPanEffects = stereoData.usesHeadsetPanEffects;
-    if (stereoHeadsetEffects && gAudioContext.soundMode == 1) {
+    if (stereoHeadsetEffects && (gAudioContext.soundMode == SOUNDMODE_HEADSET)) {
         smallPanIndex = pan >> 1;
         if (smallPanIndex > 0x3F) {
             smallPanIndex = 0x3F;
@@ -42,7 +42,7 @@ void Audio_InitNoteSub(Note* note, NoteSubEu* sub, NoteSubAttributes* attrs) {
 
         volLeft = gHeadsetPanVolume[pan];
         volRight = gHeadsetPanVolume[0x7F - pan];
-    } else if (stereoHeadsetEffects && gAudioContext.soundMode == 0) {
+    } else if (stereoHeadsetEffects && (gAudioContext.soundMode == SOUNDMODE_STEREO)) {
         strongLeft = strongRight = 0;
         sub->headsetPanRight = 0;
         sub->headsetPanLeft = 0;
@@ -79,7 +79,7 @@ void Audio_InitNoteSub(Note* note, NoteSubEu* sub, NoteSubAttributes* attrs) {
                 break;
         }
 
-    } else if (gAudioContext.soundMode == 3) {
+    } else if (gAudioContext.soundMode == SOUNDMODE_MONO) {
         sub->bitField0.stereoHeadsetEffects = false;
         sub->bitField0.usesHeadsetPanEffects = false;
         volLeft = 0.707f; // approx 1/sqrt(2)
diff --git a/src/code/code_800EC960.c b/src/code/code_800EC960.c
index 5a48f35e1..631014d09 100644
--- a/src/code/code_800EC960.c
+++ b/src/code/code_800EC960.c
@@ -122,7 +122,7 @@ f32 D_801305E4[4] = { 1.0f, 1.12246f, 1.33484f, 1.33484f }; // 2**({0, 2, 5, 5}/
 f32 D_801305F4 = 1.0f;
 u8 sGanonsTowerLevelsVol[8] = { 127, 80, 75, 73, 70, 68, 65, 60 };
 u8 sEnterGanonsTowerTimer = 0;
-s8 D_80130604 = 2;
+s8 sSoundMode = SOUNDMODE_SURROUND;
 s8 D_80130608 = 0;
 s8 sAudioCutsceneFlag = 0;
 s8 sSpecReverb = 0;
@@ -3987,7 +3987,7 @@ void Audio_SetSoundProperties(u8 bankId, u8 entryIdx, u8 channelIdx) {
         case BANK_ENV:
         case BANK_ENEMY:
         case BANK_VOICE:
-            if (D_80130604 == 2) {
+            if (sSoundMode == SOUNDMODE_SURROUND) {
                 sp38 = func_800F3990(*entry->posY, entry->sfxParams);
             }
             FALLTHROUGH;
@@ -3997,7 +3997,8 @@ void Audio_SetSoundProperties(u8 bankId, u8 entryIdx, u8 channelIdx) {
             reverb = Audio_ComputeSoundReverb(bankId, entryIdx, channelIdx);
             panSigned = Audio_ComputeSoundPanSigned(*entry->posX, *entry->posZ, entry->token);
             freqScale = Audio_ComputeSoundFreqScale(bankId, entryIdx) * *entry->freqScale;
-            if (D_80130604 == 2) {
+
+            if (sSoundMode == SOUNDMODE_SURROUND) {
                 behindScreenZ = sBehindScreenZ[(entry->sfxParams & SFX_FLAG_10) >> SFX_FLAG_10_SHIFT];
                 if (!(entry->sfxParams & SFX_FLAG_11)) {
                     if (*entry->posZ < behindScreenZ) {
@@ -4023,7 +4024,7 @@ void Audio_SetSoundProperties(u8 bankId, u8 entryIdx, u8 channelIdx) {
 
             if ((baseFilter | sAudioExtraFilter) != 0) {
                 filter = (baseFilter | sAudioExtraFilter);
-            } else if (D_80130604 == 2 && !(entry->sfxParams & SFX_FLAG_13)) {
+            } else if ((sSoundMode == SOUNDMODE_SURROUND) && !(entry->sfxParams & SFX_FLAG_13)) {
                 filter = func_800F37B8(behindScreenZ, entry, panSigned);
             }
             break;
@@ -5010,29 +5011,32 @@ void Audio_SetCodeReverb(s8 reverb) {
     }
 }
 
-void func_800F6700(s8 arg0) {
-    s8 sp1F;
+void func_800F6700(s8 audioSetting) {
+    s8 soundModeIndex;
 
-    switch (arg0) {
+    switch (audioSetting) {
         case 0:
-            sp1F = 0;
-            D_80130604 = 0;
+            soundModeIndex = SOUNDMODE_STEREO;
+            sSoundMode = SOUNDMODE_STEREO;
             break;
+
         case 1:
-            sp1F = 3;
-            D_80130604 = 3;
+            soundModeIndex = SOUNDMODE_MONO;
+            sSoundMode = SOUNDMODE_MONO;
             break;
+
         case 2:
-            sp1F = 1;
-            D_80130604 = 1;
+            soundModeIndex = SOUNDMODE_HEADSET;
+            sSoundMode = SOUNDMODE_HEADSET;
             break;
+
         case 3:
-            sp1F = 0;
-            D_80130604 = 2;
+            soundModeIndex = SOUNDMODE_STEREO;
+            sSoundMode = SOUNDMODE_SURROUND;
             break;
     }
 
-    Audio_SeqCmdE0(SEQ_PLAYER_BGM_MAIN, sp1F);
+    Audio_SeqCmdE0(SEQ_PLAYER_BGM_MAIN, soundModeIndex);
 }
 
 void Audio_SetBaseFilter(u8 filter) {
@@ -5255,7 +5259,7 @@ void Audio_PlayNatureAmbienceSequence(u8 natureAmbienceId) {
             Audio_QueueSeqCmd(0x80000000 | (SEQ_PLAYER_BGM_MAIN << 24) | (port << 0x10) | (channelIdx << 8) | val);
         }
 
-        Audio_SeqCmd8(SEQ_PLAYER_BGM_MAIN, CHANNEL_IO_PORT_7, NATURE_CHANNEL_UNK, D_80130604);
+        Audio_SeqCmd8(SEQ_PLAYER_BGM_MAIN, CHANNEL_IO_PORT_7, NATURE_CHANNEL_UNK, sSoundMode);
     }
 }
 
diff --git a/src/code/code_800F9280.c b/src/code/code_800F9280.c
index b1d28d681..a139b254f 100644
--- a/src/code/code_800F9280.c
+++ b/src/code/code_800F9280.c
@@ -16,7 +16,12 @@ u8 sSeqCmdWrPos = 0;
 u8 sSeqCmdRdPos = 0;
 u8 D_80133408 = 0;
 u8 D_8013340C = 1;
-u8 D_80133410[] = { 0, 1, 2, 3 };
+u8 sSoundModeList[] = {
+    SOUNDMODE_STEREO,
+    SOUNDMODE_HEADSET,
+    SOUNDMODE_SURROUND,
+    SOUNDMODE_MONO,
+};
 u8 gAudioSpecId = 0;
 u8 D_80133418 = 0;
 
@@ -342,7 +347,7 @@ void Audio_ProcessSeqCmd(u32 cmd) {
             switch (subOp) {
                 case 0:
                     // set sound mode
-                    Audio_QueueCmdS32(0xF0000000, D_80133410[val]);
+                    Audio_QueueCmdS32(0xF0000000, sSoundModeList[val]);
                     break;
                 case 1:
                     // set sequence starting disabled?