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AGC input on VCFQ

AGC input on VCFQ

2012-02-19 by deadcustomers

So the gain on the 2nd input of the VCFQ decreases as Q increases.

For a long time, I haven't been able to figure out how this is useful and just last night I finally thought of a configuration where it could be:

If you have an external feedback path patched into the AGC input, the Q control (and CV) acts as a crossfader between internal and external feedback.

Anyone else know of another way the AGC input is useful?

Does anyone know why this feature was implemented instead of just a 2nd input?

epk

Re: AGC input on VCFQ

2012-02-19 by John P

As far as I know, the AGC prevents the VCFQ from self-resonating. Turn up the Q on most filters and
they start to howl with resonant feedback. The AGC lets you run the VCF at very high Q without this howling.
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On 2/18/2012 10:32 PM, deadcustomers wrote:

So the gain on the 2nd input of the VCFQ decreases as Q increases.

For a long time, I haven't been able to figure out how this is useful and just last night I finally thought of a configuration where it could be:

If you have an external feedback path patched into the AGC input, the Q control (and CV) acts as a crossfader between internal and external feedback.

Anyone else know of another way the AGC input is useful?

Does anyone know why this feature was implemented instead of just a 2nd input?

epk


Re: AGC input on VCFQ

2012-02-20 by S V G

Serge once said that the AGC input was very useful when wanting to use the Notch output.

Stephen




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