via this auction
Note this does require an Apple II and software to run. You don't see pics of the card often.
See this post and this post for a couple of video overviews of the CMU-800. A search will bring up previous posts.
"Up for sale is a very rare Roland CMU-800 CompuMusic vintage analog synthesizer/sequencer module. Additionally it has 8 cv/gate outs for controlling other gear that supports this feature.The unit powers on and the LED lights up, but that is all as far as the testing goes as I don't have the needed gear to test. So I am selling this AS IS.
It also comes with an Apple II interface card -- no software though. (Everything you get is in the two photos).
If you search the net there is a way of making or buying a MIDI interface for this. One is available for around $75 from beatnic.jp, which is based on an atMega168 using schematics and c code another Japanese fellow developed. I'll include on a DVD-ROM this set of files. -- in case you want to implement your own using the schematics, printed circut board image file and the c code.
I read that with the MIDI interface you can trigger all 8 channels of the cv/gate -- for compatible gear. Channel 8 has a nice portamento effect."
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