diff --git a/src/main.rs b/src/main.rs
index a5c6b5d..a365ae0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -315,6 +315,7 @@ impl Lsdpack {
             }
             NextBank => { /* lol */ }
             AmpDecPu0 => {
+                // https://github.com/LIJI32/SameBoy/blob/27b5935b8d0e0af988bcac8e55e92703af24f335/Core/apu.c#L341
                 let base = TONE1_PATTERN.read();
                 TONE1_PATTERN.write(
                     base.with_volume(0)
@@ -436,6 +437,12 @@ extern "C" fn main() -> ! {
             .with_enabled(true),
     );
 
+    SOUNDBIAS.write(
+        SoundBias::new()
+            .with_bias_level(0x100)
+            .with_sample_cycle(SampleCycle::_6bit),
+    );
+
     unsafe {
         LSDJ_SONGS.play_song(0);
     }