Adding waveshapers to the ASM-1

[Don Tillman]

   From: gstopp at fibermux.com
   Date: Tue, 17 Dec 96 11:24:50 PST

   I saw a post yesterday that mentioned adding triangle and sine wave 
   outputs to the ASM-1 VCO. In yet another case of totally off-the-wall 
   coincidence I had been recently toying around with that very same 
   idea, and that made me poke around in my papers till I found the 
   one-transistor saw-to-triangle trick.

   So I tried it - it works! One 2N3904, two resistors. Sawtooth in, zero 
   to +5, triangle out, +2 to +4.5.

   Looks like this:

Hey Gene, you should recognize that one!  It's sawtooth-to-triangle
converter used on the Moog modular.

(And, needless to say, yet another example of Uncle Bob's way with
simple, elegant and musical engineering.)

  -- Don