[sdiy] CGS Analog Logic queries

[David G. Dixon]

Ian, it's funny, but I did more or less exactly the same thing when faced
with the XOR ring-mod part of the CGS Digital Noise circuit.  I wanted to
see what would happen when I put audio signals through it, so I simulated it
in Multisim.  I didn't find the outcome that interesting, personally.

However, the CGS Analog Logic circuit takes several incoming voltage sources
and gives either the minimum or the maximum voltage.  Hence, if you have a
sine and a sawtooth coming in, the AND function will give the lower lobes of
the sine until they cross the saw, then it will give the slope of the saw
until the sine crosses it again.  The OR function will do the same with the
upper lobes.  If you take the AND and OR outputs together on two scope
channels, you will reproduce the original sine and saw waveforms, but as
mixtures of the two, one above and the other below the ground level.

I have no idea what any of this would sound like if audio signals were
processed through this beast, nor how one would usefully employ it as a CV
modifier.  The concept is kinda cool, though.  I was just curious what other
folks have done with theirs, although I can't see that anyone on the
electro-music CGS forum has actually built one...


> At 03:06 PM 1/11/2010, David G. Dixon wrote:
> 
> >2.  My other question is:  What do you use this thing for?
> 
> I have an analog XOR module that is up here:
> http://electro-music.com/forum/topic-21851.html&postorder=asc
> 
> There are several example clips in the thread.
> 
> Ian