diff --git a/chiptune_debug/NOTES b/chiptune_debug/NOTES
index ca778ab9..591071ef 100644
--- a/chiptune_debug/NOTES
+++ b/chiptune_debug/NOTES
@@ -23,3 +23,7 @@ also turn off A/B freq		still issue
 also turn off noise/Aamp/Bamp	still issue
 move to single output routine	still issue
 always volume 12		still issue
+fix clear accidentally wr r14	still issue
+generate single tone		FINE!!!
+only play first 16 notes	still issue
+
diff --git a/chiptune_debug/chiptune_tiny.s b/chiptune_debug/chiptune_tiny.s
index 238c801d..a68fcbf5 100644
--- a/chiptune_debug/chiptune_tiny.s
+++ b/chiptune_debug/chiptune_tiny.s
@@ -173,7 +173,7 @@ write_ay_both:
 	; should silence the card
 	;=======================================
 clear_ay_both:
-	ldx	#14
+	ldx	#13
 	lda	#0
 	sta	MB_VALUE
 clear_ay_left_loop:
@@ -214,6 +214,7 @@ mb_write_frame:
 
 	; 4: C CHANNEL FINE
 	ldx	#4
+;	lda	#$51
 	lda	c_fine,Y
 	sta	MB_VALUE
 	jsr	write_ay_both
@@ -238,6 +239,9 @@ mb_write_frame:
 
 increment_offset:
 	inc	MB_CHUNK_OFFSET		; increment offset
+	lda	MB_CHUNK_OFFSET
+	and	#$f
+	sta	MB_CHUNK_OFFSET
 
 done_interrupt:
 	pla			; restore a				; 4
@@ -251,20 +255,5 @@ done_interrupt:
 c_fine:
 
 .byte $51,$3c,$32,$50,$3d,$32,$50,$3c, $33,$50,$3c,$32,$51,$3c,$32,$50
-.byte $3d,$32,$50,$3c,$33,$50,$3c,$32, $51,$3c,$32,$50,$3d,$32,$50,$3c
-.byte $33,$50,$3c,$32,$51,$3c,$32,$50, $3d,$33,$50,$3c,$32,$51,$3c,$32
-.byte $50,$3d,$33,$50,$3c,$32,$51,$3c, $32,$50,$3d,$33,$50,$3c,$32,$51
-.byte $3c,$32,$50,$3d,$33,$50,$3c,$32, $51,$3c,$32,$50,$3d,$33,$50,$3c
-.byte $32,$51,$3c,$32,$50,$3d,$33,$50, $3c,$32,$51,$3c,$32,$50,$3d,$33
-.byte $4c,$3c,$32,$4b,$3d,$32,$4b,$3c, $33,$4b,$3c,$32,$4c,$3c,$32,$4b
-.byte $3d,$32,$4b,$3c,$33,$4b,$3c,$32, $4c,$3c,$32,$4b,$3d,$32,$4b,$3c
-.byte $33,$4b,$3c,$32,$4c,$3c,$32,$4b, $3d,$33,$4b,$3c,$32,$4c,$3c,$32
-.byte $4b,$3d,$33,$4b,$3c,$32,$4c,$3c, $32,$4b,$3d,$33,$4b,$3c,$32,$4c
-.byte $3c,$32,$4b,$3d,$33,$4b,$3c,$32, $4c,$3c,$32,$4b,$3d,$33,$4b,$3c
-.byte $32,$4c,$3c,$32,$4b,$3d,$33,$4b, $3c,$32,$4c,$3c,$32,$4b,$3d,$33
-.byte $51,$43,$32,$50,$44,$32,$50,$43, $33,$50,$43,$32,$51,$43,$32,$50
-.byte $44,$32,$50,$43,$33,$50,$43,$32, $51,$43,$32,$50,$44,$32,$50,$43
-.byte $33,$50,$43,$32,$51,$43,$32,$50, $44,$33,$50,$43,$32,$51,$43,$32
-.byte $50,$44,$33,$50,$43,$32,$51,$43, $32,$50,$44,$33,$50,$43,$32,$51