diff --git a/hooks.asm b/hooks.asm
index 0731804..efaa51c 100755
--- a/hooks.asm
+++ b/hooks.asm
@@ -2265,6 +2265,9 @@ org $02A9B0 ; (BCS $A9B7)
 NOP #2
 org $02C1C8 ; (BCS $C1CC)
 NOP #2
+;
+org $02ADA0 ; (LDA.b #$F1 : STA $012C)
+JSL Overworld_MosaicDarkWorldChecks : NOP
 ;--------------------------------------------------------------------------------
 org $05CC58 ; <- Bank05.asm:1307 (LDA $040A : CMP.b #$18)
 JSL PsychoSolder_MusicCheck
diff --git a/msu.asm b/msu.asm
index b2f5884..5a601a5 100644
--- a/msu.asm
+++ b/msu.asm
@@ -198,6 +198,7 @@ CheckMusicLoadRequest:
             CMP.b #02 : BEQ .lightworld
             CMP.b #09 : BEQ .darkworld
             CMP.b #13 : BEQ .darkwoods
+            CMP.b #15 : BEQ .darkwoods
             CMP.b #16 : BEQ .castle
             CMP.b #17 : BEQ .dungeon
             CMP.b #22 : BEQ .dungeon
@@ -220,11 +221,7 @@ CheckMusicLoadRequest:
             LDA.b #61 : BRA .check_fallback-3 
 .darkwoods
             PHA
-                LDA $7EF37A : CMP.b #$7F : BNE +
-                    LDA !REG_MSU_FALLBACK_TABLE+7 : BIT #$10 : BEQ +
-                    PLA : LDA.b #61 : STA !REG_MUSIC_CONTROL_REQUEST
-                    BRA .mute
-                +
+                LDA $7EF37A : CMP.b #$7F : BEQ -
                 LDA $7EF3CA : BEQ --
                 LDA $8A : CMP #$40 : BNE --
             PLA
diff --git a/music.asm b/music.asm
index 7e7e6dd..9269a90 100644
--- a/music.asm
+++ b/music.asm
@@ -259,6 +259,27 @@ PsychoSolder_MusicCheck:
 RTL
 ;--------------------------------------------------------------------------------
 
+;--------------------------------------------------------------------------------
+; Additional dark world checks to determine whether or not to fade out music
+; on mosaic transitions
+; 
+; On entry, A = $8A (overworld area being loaded)
+Overworld_MosaicDarkWorldChecks:
+    CMP.b #$40 : beq .checkCrystals
+    CMP.b #$42 : beq .checkCrystals
+    CMP.b #$50 : beq .checkCrystals
+    CMP.b #$51 : bne .doFade
+
+.checkCrystals
+    LDA $7EF37A : CMP.b #$7F : BEQ .done
+
+.doFade
+    LDA.b #$F1 : STA $012C  ; thing we wrote over, fade out music
+
+.done
+    RTL
+;--------------------------------------------------------------------------------
+
 ;--------------------------------------------------------------------------------
 !SPCFreeSpace = $0700