[sdiy] Ladder filters and gain drop, that old chestnut

[mskala at ansuz.sooke.bc.ca]

On Thu, 27 Aug 2015, Tom Wiltshire wrote:
> What happens if you stick an extra unity-gain inverter at the end of the
> filter?
>
> Then you'd be able to use positive feedback for the resonance, and
> adding the input signal into the resonance VCA (or pot) wouldn't change
> the tone so much (since it'd be a simple sum, rather than the difference
> of the two signals). Does this make sense, or do I need more tea?

More tea for you, I think.  Inverting and then adding is not really
different from subtracting.
-- 
Matthew Skala
mskala at ansuz.sooke.bc.ca                 People before principles.
http://ansuz.sooke.bc.ca/