diff --git a/028.bs/Makefile b/028.bs/Makefile
index 863d5ba..8d4bbce 100644
--- a/028.bs/Makefile
+++ b/028.bs/Makefile
@@ -168,7 +168,7 @@ out/falling.raw: assets/falling.wav
 	sox assets/falling.wav -b 8 -c 1 -r 8000 out/falling.raw
 
 out/jump.raw: assets/jump.wav
-	sox assets/jump.wav -c 1 -r 13000 -b 8 out/jump.raw
+	sox -v 0.98 assets/jump.wav -c 1 -r 13000 -b 8 out/jump.raw
 
 out/main.o: $(IMAGEDATA) out/background-map.s out/foreground-map.s Makefile link.script.x out/playarea_fade.s out/flags_fade.s out/panelFade.s out/tileFade.s out/jump.raw out/falling.raw
 
diff --git a/028.bs/game1.s b/028.bs/game1.s
index 1555b0e..6b94bf9 100644
--- a/028.bs/game1.s
+++ b/028.bs/game1.s
@@ -46,15 +46,6 @@ Entry:
 	lea	Level3InterruptHandler,a3
  	move.l	a3,LVL3_INT_VECTOR
 
-
-	if 0
-	lea	Level4InterruptHandler,a3
- 	move.l	a3,LVL4_INT_VECTOR
-	endif
-
-
-	;; 	move.w	#(INTF_SETCLR|INTF_VERTB|INTF_INTEN),INTENA(a6)	
-	
 	jsr	StartMusic
 	jsr	ShowSplash
 	jsr 	BlueFill	
@@ -75,14 +66,12 @@ Entry:
 	lea	panel,a1
 	jsr	PokePanelBitplanePointers	
 
-
 	lea	mpanelCopperListBpl1Ptr,a0
 	lea	mpanel,a1
 	jsr	PokePanelBitplanePointers
 	
 	bsr	ShowMessagePanel
 
-
 	jsr	Init		  ; enable the playfield
 	jsr	InstallSpriteColorPalette
 
@@ -192,7 +181,7 @@ GameLoop:
 
 	jsr	WaitVerticalBlank
 
-	MOVE.W  #2,AUD3LEN(a6) ;Set length in words
+	move.w  #2,AUD3LEN(a6) ; set the empty sound for the next sample to be played	
 	move.l	#emptySound,AUD3LCH(a6)
 	
 	if      TIMING_TEST=1
@@ -213,10 +202,6 @@ GameLoop:
 .s2:	
 
 	jsr	ProcessJoystick
-	if 0
-	btst.b	#0,joystick
-	bne	.setMoving
-	endif
 	cmp.w	#PLAYER_INITIAL_X+16*3,spriteX
 	bge	.setMoving
 	addq.w	#1,movingCounter
@@ -232,6 +217,7 @@ GameLoop:
 	
 	
 	bsr 	Update
+	jsr	CheckPlayerMiss	
 	bsr	RenderNextForegroundFrame
 	jsr 	RenderNextBackgroundFrame
 
@@ -246,17 +232,6 @@ GameLoop:
 	jsr	RenderPathway
 .dontRenderPathway:
 
-
-
-	if 0
-	move.w	pathwayYIndex,d6	
-	cmp.w	#0,d6
-	beq	.dontRenderMapTile
-	move.w	pathwayXIndex,d5	
-	bsr	RenderMapTile		
-.dontRenderMapTile:
-	endif
-	
 	if TIMING_TEST=1
 	move.w	#$f00,COLOR00(a6)
 	move.w	#$f00,COLOR02(a6)			
@@ -300,7 +275,7 @@ Update:
 	jsr	InstallNextPathwayColor
 .dontInstallNextPathwayColor:
 	add.w	#1,pathwayFadeCount
-	jsr	CheckPlayerMiss
+	;; 	jsr	CheckPlayerMiss
 
 	rts
 
@@ -667,13 +642,10 @@ PostMissedTile:
 
 	
 BigBang:
-	jsr	PlayFalling
-	move.l	#10,d0
-.loop:
+	jsr	PlayFallingSound
 	jsr	WaitVerticalBlank		
-	dbra	d0,.loop
-	
-	MOVE.W  #2,AUD3LEN(a6) ;Set length in words
+
+	move.w  #2,AUD3LEN(a6) ; set the empty sound for the next sample to be played
 	move.l	#emptySound,AUD3LCH(a6)			
 
 	jsr	ResetItems
@@ -813,42 +785,6 @@ Level3InterruptHandler:
 	rte
 
 
-	if 0
-Level4InterruptHandler:
-	movem.l	d0-a6,-(sp)
-	lea	CUSTOM,a6
-.checkVerticalBlank:
-	move.w	INTREQR(a6),d0
-	and.w	#INTF_AUD0,d0		
-	beq	.interruptComplete
-
-	move.l	#1000,d0
-.loop:
-	dbra	d0,.loop
-	
-	move.w	#INTF_AUD0,INTREQ(a6)	; clear interrupt bit	
-	MOVE.W  #2,AUD0LEN(a6) ;Set length in words
-	move.l	#jump,AUD0LCH(a6)	
-	move.w	#INTF_AUD0,INTENA(a6)	
-
-	if 0
-	move.w	#DMAF_AUD0,DMACON(a6)
-
-	lea	verticalBlankCounterText,a0
-	bsr	IncrementCounter	
-
-	if 0
-	MOVE.W  #1,AUD0PER(a6)
-        MOVE.W  #0,AUD0VOL(a6) ;Use maximum volume	
-	MOVE.W  #2,AUD0LEN(a6) ;Set length in words		
-	endif
-	endif
-.interruptComplete:
-
-	movem.l	(sp)+,d0-a6
-	rte
-	endif
-
 Message:
 	;; a0 - bitplane
 	;; a1 - text
diff --git a/028.bs/player.s b/028.bs/player.s
index f805cfb..9416733 100644
--- a/028.bs/player.s
+++ b/028.bs/player.s
@@ -157,22 +157,22 @@ ProcessJoystick:
 	cmp.b	#3,joystickpos
  	bne	.notRight
 	move.w	#PLAYER_JUMP_PIXELS+PLAYER_PAUSE_PIXELS,spriteR
-	jsr	PlaySound
+	jsr	PlayJumpSound
 .notRight:
 	cmp.b	#1,joystickpos
  	bne	.notUp
 	move.w	#PLAYER_JUMP_PIXELS+PLAYER_PAUSE_PIXELS,spriteU
-	jsr	PlaySound	
+	jsr	PlayJumpSound	
 .notUp:
 	cmp.b	#5,joystickpos
  	bne	.notDown
 	move.w	#PLAYER_JUMP_PIXELS+PLAYER_PAUSE_PIXELS,spriteD
-	jsr	PlaySound	
+	jsr	PlayJumpSound	
 .notDown:
 	cmp.b	#7,joystickpos
  	bne	.notLeft
 	move.w	#PLAYER_JUMP_PIXELS+PLAYER_PAUSE_PIXELS,spriteL
-	jsr	PlaySound	
+	jsr	PlayJumpSound	
 .notLeft:	
 .skip:
 	rts
diff --git a/028.bs/sound.s b/028.bs/sound.s
index 96cd3fd..d20540b 100644
--- a/028.bs/sound.s
+++ b/028.bs/sound.s
@@ -1,32 +1,23 @@
 	include "includes.i"
-	xdef	PlaySound
-	xdef	PlayFalling	
+	xdef	PlayJumpSound
+	xdef	PlayFallingSound
 	
-PlaySound:
-	LEA     jump(pc),a1 ;Address of data to
-        MOVE.L  a1,AUD3LCH(a6) ;The 680x0 writes this as though it were a
-        MOVE.W  #123,AUD3PER(a6)
-        MOVE.W  #64,AUD3VOL(a6) ;Use maximum volume
-	MOVE.W  #(endJump-jump)/2,AUD3LEN(a6) ;Set length in words
+PlayJumpSound:
+	lea     jump(pc),a1
+        move.l  a1,AUD3LCH(a6)
+        move.w  #123,AUD3PER(a6)
+        move.w  #64,AUD3VOL(a6)
+	move.w  #(endJump-jump)/2,AUD3LEN(a6) ;Set length in words
 	move.w	#(DMAF_AUD3|DMAF_SETCLR),DMACON(a6)
-
-	if 0
-	move.l	#1000,d0
-.loop:
-	dbra	d0,.loop
-	
-	MOVE.W  #2,AUD3LEN(a6) ;Set length in words
-	move.l	#jump,AUD3LCH(a6)
-	endif
 	rts
 
 
-PlayFalling:
-	LEA     falling(pc),a1 ;Address of data to
-        MOVE.L  a1,AUD3LCH(a6) ;The 680x0 writes this as though it were a
-        MOVE.W  #256,AUD3PER(a6)
-        MOVE.W  #25,AUD3VOL(a6) ;Use maximum volume
-	MOVE.W  #(endFalling-falling)/4,AUD3LEN(a6) ;Set length in words
+PlayFallingSound:
+	lea     falling(pc),a1
+        move.l  a1,AUD3LCH(a6)
+        move.w  #256,AUD3PER(a6)
+        move.w  #25,AUD3VOL(a6) 
+	move.w  #(endFalling-falling)/4,AUD3LEN(a6) ;Set length in words
 	move.w	#(DMAF_AUD3|DMAF_SETCLR),DMACON(a6)
 	rts	
 
diff --git a/doc/BuildingCrossDev.md b/doc/BuildingCrossDev.md
index 4e71c02..6443c9f 100644
--- a/doc/BuildingCrossDev.md
+++ b/doc/BuildingCrossDev.md
@@ -128,3 +128,12 @@ Notes:
     # /Applications/CMake.app/Contents/bin/cmake ..
     # make install
 ```
+
+11. SOX
+    ```
+    # git clone git://sox.git.sourceforge.net/gitroot/sox/sox
+    # cd sox
+    # autoreconf -i
+    # ./configure --prefix=/usr/local
+    # make install
+```