[sdiy] Article "Analyzing the Moog Filter"

Neil Johnson neil.johnson71 at gmail.com
Fri Aug 23 09:34:19 CEST 2019


Hi,

Brian Willoughby wrote:

> Second, if you were to build a 4-pole SVF, would it be considered two
> 2-pole low-pass sections in series, or would the two dual integrators make
> some folks call it “four” single-pole low-pass sections in series?
>
> Since I haven’t tried this, I’m not familiar with how global feedback
> might cause problems with 2 SVF in series. I do recall some nice
> discussions around here, though.
>

Note that it is perfectly possible to build higher order state variable
filters - 3-pole, 4-pole, etc - without cascading 2-pole SVFs.

Neil
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