Thanks, I'm using wave with cue, don't have bin. Do you have sonic cd working with proper audio? Just want to confirm it is possible or if we have to wait on an update?
I probably should have been more clear in my initial post, but disc images with external sound files (WAV, MP3, OGG, etc) won't play CD audio in Retroarch cores. BIN/CUE disc images will work because the audio is part of the BIN disc image and therefore will play the CD audio when you load the CUE file in Retroarch. So yes, you'll get proper music in Sonic CD on the Genesis/Mega Drive Retroarch cores (Gen Plus GX and Picodrive) if you use a BIN/CUE image.