CASIO GZ-50M is a compact GM sound module.
It uses PCM playback with one multi-effect.
CASIO GZ-50M (1995)
Using Emagic SoundDiver,
I made GZ-50M Performance editor that creates sounds by layering up to 4 sounds.
To use my editor, you need SoundDiver.
See the links below for detailed info, downloads, and .mp3 sound examples.