[sdiy] Calculator Synth

[R.D. Hess]

--- Grant Richter <grichter at asapnet.net> wrote:
> John Simonton had a great design for a matrix
> scanning keyboard dating back
> to the 4700 series. It was very simple to implement,
> only two CD4051s and a
> counter (very vaguely remembered) and the design
> automatically made an
> arpeggiator.
> 
> It was the alternative to the 4700 keyboard with the
> computer. It used a DAC
> to make the output voltage. Does anyone have a copy
> they could scan? Or know
> where one is on the net (http://www.paia.com maybe).
> 
> It really was very simple and extremely clever, like
> many of John's designs.
> 

 Sounds like the 8782, which is conveniently located
at:

http://omega.tellus.vallentuna.se/anders/pdf/8782a.pdf

 Rich

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