Roland groovebox MC-303 is a PCM synthesizer with sequencer and realtime controllers.
Its synthesis engine is based on GS -
SoundCanvas SC-55mkII.
Roland MC-303 (1996)
I made a new MC-303 Performance editor
for Emagic SoundDiver
that can create sounds by layering multiple tones.
See the links below for detailed info, downloads, and .mp3 sound examples.