[sdiy] Vactrols subbed for dual-gang pot

[cheater cheater]

well, given that it's 'sort of' like a low-pass filter, and feedback
around a low pass filter adds resonance..


With normal LPF's if you have two of them in parallel, one with 0
resonance and one with some good amount of resonance, the bump in the
resonating one will take the content at the resonant frequency and
give it, say, 1.5x or 2x gain. If you mix the outputs together then
the pass-band will still be 1x gain but the corner frequency will
still be passed through at nice enough gain.


>From what I understand, technically, this whole network is then a
single LPF with a higher order, but I'm probably wrong on that, since
it's just intuitive understanding..

So maybe that's what he's doing with two vactrols and just giving one feedback.

Cheers,
D.

On Mon, Jul 12, 2010 at 03:36,  <lanterma at ece.gatech.edu> wrote:
>
> On Jul 11, 2010, at 9:19 PM, cheater cheater wrote:
>
>> does this 'add resonance' to the vactrol's 'low pass filter'? in which
>> case i can see how that would raise the bandwidth by say an octave or
>> a half.
>
> Sorry I've lost you there.
>
> - Aaron
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