Simmons SDS800 modifications (CEM3394 chip!)

-MIDI-to-trigger interface
-resonance
-waveform selection
-pulse width
-oscillator to filter fm
-second skin frequency control
-run generator to filter freq
-shorter min,longer max decays
-lower filter range
-negative filter envelopes
-more percussive envelopes (added a transistor to help charge cap)

modified sds800 mp3

UPDATE: added a bunch of CV ins and outs, run generator outs, etc. + 2 CV joysticks.
CEM3394 datasheet
Aaron Cram's CEM3394 interface
Simmons yahoogroup