Doepfer

Another VCA technique is Amplitude Modulation (AM).  Patch a VCO into 
the signal input of a VCA.  Next, patch another VCO into the CV input 
of the VCA.  Make sure both VCO's are in the audio range.  

The effect is similar to ring modulation, only more predictable 
(which isn't that surprising, since simple AM responds to positive 
voltages, and RM responds to both positive and negative voltages).

Regards,
Kevin


--- In Doepfer_a100@yahoogroups.com, "Pierre Zeeman" <pierrezee@h...> 
wrote:
> Kevin,
> 
> As a VCA = end of the line man, I was very interested in this 
statement of 
> yours:
> 
> >I, for one, use a number of VCA's because I view them as more than
> >simple gain controls, or the final module in a patch.  To me, VCA's
> >are basic automation devices, and when used to control modulator
> >outputs (for both for level and time), VCA's can animate a patch.
> 
> Perhaps I am misunderstanding you here, but it seems to me you are 
talking 
> about using the VCA as a stage to pass a modulator through on the 
way to the 
> carrier.  You would then apply automation to the VCA (via seq, env, 
lfo, 
> whatever) which would in turn modulate the signal passing through 
the VCA 
> and, hence, ultimately the carrier itself.  While this would be 
very useful 
> for a carrier which has a CV input for modulation but no modulation 
amount 
> knob, surely it's just wasting a VCA where the CV input on the 
carrier does 
> allow depth to be set as well?
> 
> The reason I ask is because I have always suspected that I am 
lacking 
> something fundamental in my approach to the use of VCAs...
> 
> TIA
> 
> Pierre
> 
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