[sdiy] First CGS modules done!

[David G. Dixon]

Tonight I panelized and tested my customized version of Ken Stone's Analog
Logic module, and installed it next to my completely revised and tricked out
Analog Shift Register module.  Both are 1U in (pseudo) MOTM format.

I've been having tons of fun with the ASR, which works perfectly, even at
audio rates (no fires!).  I installed an attenuator and a Load/Loop switch
on the input (Load is normal, Loop sends Output 3 back to the input for
3-note loops), Shift/Bypass buttons on the outputs (Bypass sends the input
signal to the output jack -- useful for creating variety when clocking with
a keyboard gate/trigger), changed the clock so that any positive 2V crossing
triggers it (not just rising edges) and totally overhauled the circuit with
more appropriate chips and an onboard 5V supply.  I was going to build a
dual unit in a 2U panel with Output 3 of Unit 1 normalled to Input 2, but I
decided in the end not to.  I'm happy with my choice.  If I need/want
another one, I'll just build a duplicate 1U unit later.

I've rigged up my triple LFO so that two of them are syncing the third,
which is thus sending a fairly long and complex "samba-like" pulse pattern
to the ASR clock.  I'm using a slow, attenuated sine wave as the input, and
sending the outputs to three VCO 1V/oct inputs.  I've got the VCOs filtered
to sound either like flutes or saxes, and it sounds really cool!  All it
needs is a quantizer, and it would be like having a "Random Jazz Trio" (the
analog electronic version of the Modern Jazz Quartet) playing random 3-part
jazz chords in a samba rhythm.

Now I just have to figure out what to do with the Analog Logic module.  It's
neat how it splits compound waves into their maxima and minima, and these
can be sent to different places, but I'm not sure that it's really all that
useful.  This is one of those modules that seems to be more interesting in
theory than in practice.  I suspect it's mostly useful as a CV processor.
Can anyone tell me some cool things to do with this module?