Yahoo Groups archive

SergeModular

Index last updated: 2026-04-28 23:13 UTC

Message

Re: 4-Pole filter with 2 VCFQs

2007-05-14 by John P

I tried this a few years ago with no luck - glad to hear someone got it
right.
How would you describe the results?

paradigmshiftbeats wrote:

> "Invert the output of the envelope detector using the processor
> controlling the VCA."
>
> To directly answer your question, the envelope output is patched to
> the feedback VCA (through the processor, which in Harvey's patch
> instructions had already been patched to the feedback VCA)
>
> To elaborate, the output of a processor is connected to the VC input
> of the VCA in the feedback loop. The input to that processor comes
> from the envelope detector and, in addition to inverting that input
> using one of the bipolar attenuators, the offset control is set to
> +5v so that the feedback VCA is fully open except when the envelope
> detector is active, reducing feedback amplitude to keep the overall
> gain from getting out of hand. You may need to play with the amount
> of the processor inversion to get the behavior to suit your taste.
>
> Hope this helps!
>
> Chris
>

--
m/n/m/l
surreal electronic music, sound, noise
http://www.mnmlnoise.com

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.