diff --git a/bugfixes.asm b/bugfixes.asm
index 8f678ba..fca00aa 100644
--- a/bugfixes.asm
+++ b/bugfixes.asm
@@ -81,11 +81,8 @@ FixAga2Bunny:
 	JSL DecideIfBunny : BNE +
 		JSR MakeBunny
 	+
-	.done
-	PHX
-		JSL Overworld_DetermineMusic : STX.w MusicControlRequest
-	PLX
-RTL
+.done
+JML Overworld_DetermineAndSetMusic
 ;--------------------------------------------------------------------------------
 
 ;--------------------------------------------------------------------------------
diff --git a/hooks.asm b/hooks.asm
index 65afbbb..4a54e76 100755
--- a/hooks.asm
+++ b/hooks.asm
@@ -1732,7 +1732,7 @@ org $828D6E
 JSL FallingMusicFadeOut : BRA + : NOP #2 : +
 ;================================================================================
 org $829090 ; <- 11090 - Bank02.asm:3099 (LDA $7EF374 : LSR A)
-JSL CheckHeraBossDefeated : NOP
+JSL CheckHeraBossDefeated_AlsoCheckMusic : NOP
 ;================================================================================
 org $829798 ; <- 11798 - Bank02.asm:4287 (CMP $02895C, X : BNE BRANCH_ALPHA)
 NOP #6 ; remove crystal room cutscene check that causes softlocks
@@ -2243,9 +2243,39 @@ org $8AB949 ; <- Bank0A.asm:270 (Different from US ROM)
 JSL BirdTravel_LoadTargetAreaMusic
 BRA + : NOP #14 : +
 ;--------------------------------------------------------------------------------
+org $829D42
+JSL Overworld_DetermineMusic
+BRA + : NOP #4 : +
+;--------------------------------------------------------------------------------
+org $82A981
+JSL Overworld_DetermineAndSetMusic
+;--------------------------------------------------------------------------------
 org $82B027 ; <- Bank02.asm:7535-7541
 JSL Overworld_DetermineMusic
 BRA + : NOP #42 : +
+;--------------------------------------------------------------------------------
+org $82B0C4
+JSL Overworld_DetermineAndSetMusic
+BRA + : NOP #16 : +
+;--------------------------------------------------------------------------------
+org $82B1C1
+JSL Overworld_DetermineAmbientSFX
+JSL Overworld_DetermineMusic
+BRA + : NOP #64 : +
+;--------------------------------------------------------------------------------
+org $82B441
+JSL Overworld_DetermineMusic
+BRA + : NOP #4 : +
+;--------------------------------------------------------------------------------
+org $82C1BA
+JSL Overworld_DetermineMusic
+BRA + : NOP #12 : +
+;--------------------------------------------------------------------------------
+org $88C442
+JSL Overworld_DetermineAndSetMusic
+;--------------------------------------------------------------------------------
+org $9DFD27
+JSL Overworld_DetermineAndSetMusic : NOP
 ;================================================================================
 
 ;================================================================================
diff --git a/msu.asm b/msu.asm
index f3bfcef..4e1075d 100644
--- a/msu.asm
+++ b/msu.asm
@@ -120,6 +120,7 @@ IsOverworldTrack:
     CMP.b #05 : BEQ .yes ;  5 - Forest of Mystery
     CMP.b #07 : BEQ .yes ;  7 - Kakariko Village
     CMP.b #09 : BEQ .yes ;  9 - Dark Golden Land
+    CMP.b #13 : BEQ .yes ; 13 - Dark Death Mountain
     CMP.b #15 : BEQ .yes ; 15 - Dark Woods
     CMP.b #60 : BEQ .yes ; 60 - Light World OW (after ped pull)
     CMP.b #61 : BEQ .yes ; 61 - Dark World OW (with all crystals)
@@ -349,7 +350,7 @@ SpiralStairsPreCheck:
         JSL LookupSpiralOffset_long
         REP #$30 : AND.w #$00FF : ASL #2 : TAX
         LDA.l SpiralTable,X
-        SEP #$10 : TAX : CPX.b #$07 : BNE .done ; check if hera boss
+        SEP #$10 : CMP.w #$0007 : BNE .done ; check if hera boss
         JSL CheckHeraBossDefeated : BCS .done
         LDX.b #$F1 : STX.w MusicControlRequest
         BRA .done
diff --git a/music.asm b/music.asm
index f26dba8..d69f1af 100644
--- a/music.asm
+++ b/music.asm
@@ -75,16 +75,28 @@ BirdTravel_LoadTargetAreaMusic:
     RTL
 ;--------------------------------------------------------------------------------
 
+;--------------------------------------------------------------------------------
+Overworld_DetermineAndSetMusic:
+	PHX
+		JSL Overworld_DetermineMusic : STX.w MusicControlRequest
+	PLX
+RTL
+;--------------------------------------------------------------------------------
+
 ;--------------------------------------------------------------------------------
 ;X to be set to music track to load
 Overworld_DetermineMusic:
     LDA.l ProgressIndicator : CMP.b #$02 : !BGE +
         LDX.b #$03 ; If phase < 2, play the rain music
         BRA .done
-    
-    + LDA.b OverworldIndex : CMP.b #$43 : BEQ .darkMountain
-    CMP.b #$45 : BEQ .darkMountain
-    CMP.b #$47 : BEQ .darkMountain
+    +
+
+    LDA.l CurrentWorld : BEQ +
+        LDA.b OverworldIndex : ORA.b #$40
+        CMP.b #$43 : BEQ .darkMountain
+        CMP.b #$45 : BEQ .darkMountain
+        CMP.b #$47 : BEQ .darkMountain
+    +
 
     LDX.b #$02  ; hyrule field theme
 
@@ -202,11 +214,14 @@ Underworld_DoorDown_Entry:
 ;--------------------------------------------------------------------------------
 
 ;--------------------------------------------------------------------------------
+CheckHeraBossDefeated_AlsoCheckMusic:
+LDA.w LastAPUCommand : AND.w #$00FF : CMP.w #$0015 : BNE + ; if boss music is playing
+
 ; Check if the boss in ToH has been defeated (16-bit accumulator)
 CheckHeraBossDefeated:
-LDA.l RoomDataWRAM[$07].high : AND.w #$00FF : BEQ +
-    SEC : RTL
-+ CLC : RTL
+LDA.l RoomDataWRAM[$07].high : AND.w #$00FF : BNE +
+    CLC : RTL
++ SEC : RTL
 
 FallingMusicFadeOut:
     CMP.w #$0017 ; what we wrote over