MOTM

In a message dated 11/28/99 12:29:45 PM, synth1@... writes:

>99% it's for CVs, not audio. LFOs, for example. Inverted audio has no
>meaning unless you
>are trying to cancel out something (like a phaser! :)  )

This is probably why many (most?) modulars have two distinct types of mixers 
-- plus the fact that some components are better suited for audio and some 
for DC. But this also brings up a question I've had about canceling out audio 
signals. I was thinking of adding some inverting attenuating inputs to some 
DIY VCFs I've got (since they only use half of a dual op amp for the basic 
inverting mixer they currently have -- a waste of 20 cents!). 

I thought this may in fact be useful (with one big caveat) for subtracting 
out harmonics in complex waves (like subtracting out a triangle from a 
sawtooth wave), BUT (the caveat) one would have to add the fundamental since 
that would be subtracted out entirely. I'm wondering if anyone has tried 
this, or sees it as being useful? I have tried some initial experiments with 
this, and have found that using (from one VCO) a SINE and inverted TRI (or 
SQUARE) and an in phase SQUARE (or SAW), sounds better to me than using the 
in phase TRI (or SQUARE). I really like the sound and wonder what others 
think.

JB