Filter Layout question

[Harvey Devoe Thornburg]

> 
> On Thu, 10 Dec 1998, Rob wrote:
> > At the school I goto (I'm studying Japanese, not music!, but I volunteered
> > as a tutor) they have a couple of Serge panels (super basic ones), but the
> > filter section caught my eye.  It has an out put for each type of filter
> > that it does.  One input and one set of controls but you can tap into the
> > lowpass, or band, or high or a 4th one that I can't think of at the moment
> > but it doesn't matter.
> 
> Either Allpass or Notch would be my guess. I don't know Serge gear tho. 
>

Notch.  It's actually a mix of the lowpass and highpass outputs (phase
cancellation at the cutoff frequency).  As you increase the resonance
the notch gets narrower, but no side peaking, so it becomes less audible.

--Harvey