I've been playing Street Fighter Zero 3 recently. I never tried the Reverse Dramatic Battle until recently...what a trip!
I had some lag issues with the stage where you fight Juli and Juni, someone mentioned that it might be the Action Replay or anything not the official 4MB Ram cart. So I tried this run with the ST-Key and the original ram cart. It didn't have anymore slowdown...but the music is messed up still! I couldn't see any scratches etc on the disc
I tried this on two different Saturns, with the same audio results. It looks like my game is defective