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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