MOTM

Let it be known that I, Chub, have a LOT of "junk".  No, really.  I 
can hear the "typical ham" comments, too.  Don't start it.  Also, 
don't hesitate to ask me for some esoteric little do-dad that will 
put your next project in order.  Chances are that I've got several 
and, believe me, my wife will pay the postage!

That being said, I have finished testing my little, cheap CV keyboard 
this weekend!  A real keyboard player might scoff, but it is a kick 
to drive the Engine of Chaos with a keyboard.  First patch was a very 
punchy bass sound-V/Hz CV to 2 '300's, and the gate voltage to 1 '800 
controlling 1 '440, 1 '190.  Minim**g that!  

The keys came out of a RMI 'Lectric Piano from the sixties.  I hacked 
off the top 13 keys, switches and hardware (first person that chides 
me for destroying a "vintage " keyboard had better be wearing a 
cup...) and cleaned off the swarf of 40 years.  Then I replaced the 
felt put it all back together and adjusted it.  The switches are 
wired to work with the MM74C922 4x4 keyboard matrix scanner.  There 
is a good basic circuit utilizing this device at Ken Stone's website -
  http://www.cgs.synth.net/ .  He has pcb's for sale, too.  Any 
normally-open switches can be used for the matrix.  It doesn't have 
to be a keyboard and it doesn't have to control V/Hz or EG inputs. My 
circuit has a few mods but nothing truly necessary.  The MM74C922 is 
available from Mouser for $10.23.

Total cost of this project- $10.97.  Like I said, I've got a LOT 
of "junk".

Chub-waiting for that Happy Email constructively.