P2 Theremin

JonnyMac

I don't understand the Goertzel code -- yet -- but when I do, something like this is on my list of fun projects.

Publison

I put that request in the P2 Projects thread. I think a larger Goertzel board will do the trick. Moog still sells them in a newer version:
https://www.moogmusic.com/synthesizers?type=52

Bob Moog started making them back in th 50's.