diff --git a/Core/apu.c b/Core/apu.c
index d3341ef..62185e6 100644
--- a/Core/apu.c
+++ b/Core/apu.c
@@ -225,6 +225,8 @@ static void render(GB_gameboy_t *gb)
         gb->apu_output.last_update[i] = 0;
     }
     gb->apu_output.cycles_since_render = 0;
+    
+    if (gb->sgb && gb->sgb->intro_animation < GB_SGB_INTRO_ANIMATION_LENGTH) return;
 
     GB_sample_t filtered_output = gb->apu_output.highpass_mode?
         (GB_sample_t) {output.left - gb->apu_output.highpass_diff.left,