RageSoundReader::Read(char *) -> int16_t *. This was originally

char * based on the idea of supporting more than one sample type.
I don't plan to do that (though I may change the sample type to float
or int32).

stepmania/src/RageSoundReader_MP3.h

@@ -16,7 +16,7 @@ public:
 	int GetLength() const { return GetLengthConst(false); }
 	int GetLength_Fast() const { return GetLengthConst(true); }
 	int SetPosition( int iSample );
-	int Read( char *pBuf, int iFrames );
+	int Read( int16_t *pBuf, int iFrames );
 	unsigned GetNumChannels() const { return Channels; }
 	int GetSampleRate() const { return SampleRate; }
 	int GetNextSourceFrame() const;