[sdiy] Filter Not so strangeness

[Pat Kammerer]

Well,

I ditched the sallen key filter I was working on, mainly because I had made
just couple more mistake than I felt like fixing.  : )  So I've been looking
around at different designs.

I've thrown together a PAIA 2720 VCLF  (I know...), and I love the sound,
much stronger and less noisy than the other. It also seems to like single
polarity supply.

http://www.muzique.com/schem/2720-3l.gif

My question now is to anyone who may have built this into a module or
whatever;

I've read that to control resonance in this circuit you need a pot in series
with the bypass capacitor that is across the emitter resistor.  I don't see
this cap in the schematic unless I'm misunderstanding the word across  (?!)
Or is the bypass cap the one at the supply input (100uf)?  I would like this
option as it would make the sound much more versatile.  Theoretically,
instead of voltage control for cutoff I could use a varying resistance from
the two .05p caps to ground right, since the voltage creates a varying
restance using the 1n914's?

Fun simple circuit though.

Thanks for your help