diff --git a/apu/apu.cpp b/apu/apu.cpp
index 342d86d4..3e83d7f9 100644
--- a/apu/apu.cpp
+++ b/apu/apu.cpp
@@ -462,7 +462,7 @@ static void UpdatePlaybackRate (void)
 
 	if (Settings.MSU1)
 	{
-		time_ratio = 44100.0 / Settings.SoundPlaybackRate;
+		time_ratio = (44100.0 / Settings.SoundPlaybackRate) * (Settings.SoundInputRate / 32040.5);
 		msu::resampler->time_ratio(time_ratio);
 	}
 }