diff --git a/sdl/sdl-speaker.cpp b/sdl/sdl-speaker.cpp
index 2308610..5b66dab 100644
--- a/sdl/sdl-speaker.cpp
+++ b/sdl/sdl-speaker.cpp
@@ -149,7 +149,7 @@ void SDLSpeaker::maintainSpeaker(uint32_t c)
 
   // FIXME: g_volume
 
-  curSpeakerData = mixerValue & 0xFF;
+  curSpeakerData = (mixerValue & 0xFF) >> 4;
 }
 
 void SDLSpeaker::beginMixing()