YouTube via digitalbeatsyndrome.
via this auction
"I take no credit for any of the work in this film. The DIY retrofit of the CMU-800R was done by RJB who is author of the Japanese DIY synth blog Radiojunkbox."
"Roland CMU-800R Analog Synth / Drum machine. Very rare to find one of these in this condition, complete with the Apple IIe software and interface card. It has a Bass Channel (mono), Lead Channel (mono), Chord Channel (4 note poly), and Drum Channel (TR-606 drum sounds). It also has 8 Channels of CV(0 5.25v, 1v/octave) out and 8 channels of Gate out (0-12v), which would compliment the CMU-810 sister synthesizer or other analogs using CV-Gate. This particular unit was found in the basement of a music school with another flawless unit, some confused person had marked on the box sound mixer. I had hopes to MIDI retrofit it but never got around to it. I've listed links so you can listen to how the machine sounds, I do not take credit for any of the music or film in the links. The particular unit for auction is NOT in any of the videos and audio clips, I've listed them for audio demonstration only. For those who are interested in MIDI retrofitting this synth, the video by deftaudio demonstrating this machine in action with the MIDI retrofit installed. He offers the retrofit for sale."