Code (Text): SegaPCM: incbin sound\segapcm.bin even Replace it with the following: Code (Text): SegaPCM: incbin sound\segapcm.wav,$3A SegaPCM_End even Then replace "segapcm.bin" with this .wav file, this should make it easier for you to edit. The $3A represents the starting offset from inside the .wav "RIFF" file where the actual PCM data starts. The PCM sample itself is 8-bit mono PCM. I will say though, you have to be careful with which programs you use to edit the .wav file. Some programs like to insert "xtra" data on the end of the sample, some write the header of the "RIFF" data larger/smaller than expected. But the standard expected should be $3A with no "xtra" tag. You should be fine.