diff --git a/src/crab/gba/apu.cr b/src/crab/gba/apu.cr
index 8b80324..1c711d3 100644
--- a/src/crab/gba/apu.cr
+++ b/src/crab/gba/apu.cr
@@ -14,7 +14,7 @@ module GBA
     @soundcnt_l = Reg::SOUNDCNT_L.new 0
     getter soundcnt_h = Reg::SOUNDCNT_H.new 0
     @sound_enabled : Bool = false
-    @soundbias = Reg::SOUNDBIAS.new 0x3FE
+    @soundbias = Reg::SOUNDBIAS.new 0x200
 
     @buffer = Slice(Int16).new BUFFER_SIZE
     @buffer_pos = 0