diff --git a/dither4.s b/dither4.s
index eede1dc..713f048 100644
--- a/dither4.s
+++ b/dither4.s
@@ -158,7 +158,7 @@ wait_loop:
         sty COLPF2
     .endmacro
 
-    .macro audio_play_lo ; 11 cycles
+    .macro audio_play_lo
         lda audiotemp ; 3 cyc
         and #$0f ; 2 cyc
         ora #$10 ; 2 cyc
@@ -198,18 +198,18 @@ wait_loop:
 
     .macro run_frame palette1, palette2, palette3
     .scope
-    each_scanline:
-        ;audio_prep
+    each_scanline_pair:
+        audio_prep
         inner_scanline palette1, palette2, palette3
-        ;audio_play_lo
+        audio_play_lo
         inner_scanline palette1, palette2, palette3
-        ;audio_play_hi
+        ;audio_play_hi ; too slow
 
         ldy VCOUNT ; save for audio lookup
         cpy #130
-        bne each_scanline
-        ;audio_inc
+        bne each_scanline_pair
 
+        audio_inc
         lda frame_counter
         eor #1
         sta frame_counter
@@ -221,7 +221,9 @@ wait_loop:
     lda #(256 - scanline_offset)
     sta scanline
     lda frame_counter
-    bne run_frame2
+    beq run_frame1
+    jmp run_frame2
+run_frame1:
     run_frame frame1_palette1, frame1_palette2, frame1_palette3
 run_frame2:
     run_frame frame2_palette1, frame2_palette2, frame2_palette3