Minimum Parts VCO was VCO-1C

[tomg]

I never posted this because I didn't finish testing
it completely. If you don't look at the waveforms
it sounds like a saw but they look like a bad tri.

If you get rid of the exp-conv's it leaves 1/2 a
13600 one cap 2 diodes and 4 resistors. Reduces
the cost to about $.70 per key. May be just what
you want...might not be though.


http://www.mindspring.com/~vco/misc/pics/vco6a_sd.gif

-tg