multiple-type Digisound VCDO thing?

[Josh Brandt]

So, I was showing the Digisound VCDO schematic to a friend of mine, and we
were talking things to do with it...

Our ideas-- take the output from IC3b (where it goes into IC4) and duplicate
(or triplicate or quadruplicate) all of the digital circuitry, sending the
same signal from IC3b and running it into 2-4 IC4's, each of which is
connected its own IC9 (the ROM), and so on... Include separate sets of front
panel controls for each set of digital circuitry, and you can individually
select different waveforms for each one (or the same waveforms for each one,
for that matter), and you've got multiple digital sources, all tracking the
same CV. Burn a few more EPROMs, with the same (or different!) waves, and
you've got a nice big flexible module _without_ having to dig up several
CEM3340's. (It seems that making them paired-- one 3340 driving two sets of
digital circuitry-- would be the most expedient.) 

Does this seem a reasonable idea? Am I missing some basic concept here?

Sometime in and among all of this Penfoldy stuff, I'm planning on building
up a VCDO or two, since they look really neat...

Kevin-- your web site shows (and you mentioned in email, I think) DIP
switches for setting the resolution of the DAC, so you could get 4-bit
grunge, and things like that. Would that set of switches go between the ROM
and the DAC (IC9 and IC10), or somewhere else? 

What a neat circuit...

Josh