Completely ignore my previous update (since edited) about the supposed "hardware limitations" of the Super Game Boy in regards to the SGB sound playback lagging. I was very mistaken and feel silly since I know a few retail games that use SGB sounds without lag.

I'll be posting the new version of the SFX plugin very soon that should completely eliminate the lag issue, with a small bonus - a sound test rom that let's you preview each sound, assuming you load the rom on actual SGB hardware or in a supported emulator.