diff --git a/stepmania/src/RageSoundManager.cpp b/stepmania/src/RageSoundManager.cpp
index b0bfcd372b..a5fa4bb314 100644
--- a/stepmania/src/RageSoundManager.cpp
+++ b/stepmania/src/RageSoundManager.cpp
@@ -172,30 +172,6 @@ void RageSoundManager::PlayOnceFromDir( CString sDir )
 
 /* Standalone helpers: */
 
-/* Mix audio.  This is from SDL, but doesn't depend on the sound being
- * initialized. */
-void RageSoundManager::MixAudio(Sint16 *dst, const Sint16 *src, Uint32 len, float volume)
-{
-	if ( volume == 0 )
-		return;
-
-	int factor = int(volume * 256);
-	len /= 2;
-	while ( len-- ) {
-		Sint16 src1 = *src;
-		src1 = Sint16((src1*factor)/256);
-		Sint16 src2 = *dst;
-
-		int dst_sample = src1+src2;
-		dst_sample = clamp(dst_sample, -32768, 32767);
-		*dst = Sint16(dst_sample);
-
-		src++;
-		dst++;
-	}
-}
-
-
 void RageSoundManager::SetPrefs(float MixVol)
 {
 	MixVolume = MixVol;
diff --git a/stepmania/src/RageSoundManager.h b/stepmania/src/RageSoundManager.h
index e9209537c7..35e8dbf08b 100644
--- a/stepmania/src/RageSoundManager.h
+++ b/stepmania/src/RageSoundManager.h
@@ -54,7 +54,6 @@ public:
 	set<RageSound *> playing_sounds;
 	void GetCopies(RageSound &snd, vector<RageSound *> &snds);
 
-	static void MixAudio(Sint16 *dst, const Sint16 *src, Uint32 len, float volume);
 	static void AttenuateBuf( Sint16 *buf, int samples, float vol );
 };