[sdiy] More polyphonic diy

[David G. Dixon]

In my obsession with discrete polyphonic logic, I've just uncovered a very
nice link which many of you may not have seen:

http://www.mjbauer.biz/elec_music_tech.htm

This fellow from Melbourne named Michael Bauer built a prototype digital
polyphonic synth in 1974, and published an article about it in 1976.  The
whole story can be found at the link.  A great read!

(It was nice to see that I'm basically on the right track: I think I can do
the whole thing with about half a dozen chips and a RAM, which is better
than the 24 chips in my first RAM-less version.)