River_Sound OK and Documented + River_Sound Related z_actor/Audio Functions (#661)

* First pass of `func_800BCCDC`

* river_sound OK (copy progress from audio WIP)

* Copy progress from `code_8019AF00.c` (still waiting for data to be imported)

* More docs

* feedback

* Add in `code_8019AF00.c` functions

* format

* params

* Minor cleanup

* Small fix

* one more

* Better names

* Add comment, cleanup Idx

* Fix bss

* Fix BSS

tools/disasm/functions.txt

@@ -867,7 +867,7 @@
     0x800BCB70:("Actor_SetColorFilter",),
     0x800BCBF4:("func_800BCBF4",),
     0x800BCC68:("func_800BCC68",),
-    0x800BCCDC:("func_800BCCDC",),
+    0x800BCCDC:("Actor_GetClosestPosOnPath",),
     0x800BD2B4:("func_800BD2B4",),
     0x800BD384:("func_800BD384",),
     0x800BD6B8:("func_800BD6B8",),
@@ -3689,7 +3689,7 @@
     0x8019380C:("func_8019380C",),
     0x80193858:("func_80193858",),
     0x8019387C:("func_8019387C",),
-    0x801938A0:("func_801938A0",),
+    0x801938A0:("Audio_QueueCmdS8",),
     0x801938D0:("func_801938D0",),
     0x80193900:("func_80193900",),
     0x80193990:("func_80193990",),
@@ -3897,18 +3897,18 @@
     0x8019FE74:("func_8019FE74",),
     0x8019FEDC:("func_8019FEDC",),
     0x8019FF38:("func_8019FF38",),
-    0x8019FF9C:("func_8019FF9C",),
-    0x801A0048:("func_801A0048",),
-    0x801A00EC:("func_801A00EC",),
+    0x8019FF9C:("Audio_PlaySfxForRiver",),
+    0x801A0048:("Audio_PlaySfxForWaterfall",),
+    0x801A00EC:("Audio_StepFreqLerp",),
     0x801A0124:("func_801A0124",),
     0x801A0184:("func_801A0184",),
     0x801A01C4:("func_801A01C4",),
     0x801A0204:("func_801A0204",),
     0x801A0238:("func_801A0238",),
-    0x801A026C:("func_801A026C",),
-    0x801A0318:("func_801A0318",),
-    0x801A0450:("func_801A0450",),
-    0x801A046C:("func_801A046C",),
+    0x801A026C:("Audio_SetGanonsTowerBgmVolumeLevel",),
+    0x801A0318:("Audio_SetGanonsTowerBgmVolume",),
+    0x801A0450:("Audio_LowerMainBgmVolume",),
+    0x801A046C:("Audio_UpdateRiverSoundVolumes",),
     0x801A0554:("func_801A0554",),
     0x801A05E4:("func_801A05E4",),
     0x801A05F0:("func_801A05F0",),
@@ -3916,9 +3916,9 @@
     0x801A0810:("func_801A0810",),
     0x801A0868:("func_801A0868",),
     0x801A09D4:("func_801A09D4",),
-    0x801A0C70:("func_801A0C70",),
-    0x801A0C90:("func_801A0C90",),
-    0x801A0CB0:("func_801A0CB0",),
+    0x801A0C70:("Audio_ClearSariaBgm",),
+    0x801A0C90:("Audio_ClearSariaBgmAtPos",),
+    0x801A0CB0:("Audio_SplitBgmChannels",),
     0x801A0E44:("func_801A0E44",),
     0x801A1290:("func_801A1290",),
     0x801A1348:("func_801A1348",),
@@ -3935,8 +3935,8 @@
     0x801A1F88:("func_801A1F88",),
     0x801A1FB4:("func_801A1FB4",),
     0x801A2090:("func_801A2090",),
-    0x801A21FC:("func_801A21FC",),
-    0x801A2460:("func_801A2460",),
+    0x801A21FC:("Audio_PlaySariaBgm",),
+    0x801A2460:("Audio_ClearSariaBgm2",),
     0x801A246C:("func_801A246C",),
     0x801A2544:("func_801A2544",),
     0x801A257C:("func_801A257C",),
@@ -4050,7 +4050,7 @@
     0x801A7794:("func_801A7794",),
     0x801A7828:("func_801A7828",),
     0x801A787C:("func_801A787C",),
-    0x801A78E4:("func_801A78E4",),
+    0x801A78E4:("Audio_IsSfxPlaying",),
     0x801A794C:("func_801A794C",),
     0x801A7B10:("func_801A7B10",),
     0x801A7D04:("func_801A7D04",),
@@ -4061,7 +4061,7 @@
     0x801A8ABC:("func_801A8ABC",),
     0x801A8B14:("func_801A8B14",),
     0x801A8B2C:("func_801A8B2C",),
-    0x801A8BD0:("func_801A8BD0",),
+    0x801A8BD0:("Audio_SetVolumeScale",),
     0x801A8D5C:("func_801A8D5C",),
     0x801A9768:("func_801A9768",),
     0x801A982C:("func_801A982C",),