[sdiy] 4 Pole state-variable filters

[Grant Richter]

Generally designs are cascaded sections like the current PAIA filter and I
seem to recall Digisound had a design for a cascaded dual SV.

There was mention of a more advanced (second order?) topology in
Electronotes but only in block diagram, not a schematic.

> From: The Proteus <proteus at ugwarehouse.org>
> Date: Sat, 9 Feb 2002 18:06:45 -0800 (PST)
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] 4 Pole state-variable filters
> 
> Hello all,
> 
> Are there any good references in text or online on 4-Pole
> state-variable filters? I'm finally getting back into design, and would
> like to construct a filterbox that has HP, LP, and BP outputs, and would
> hate to build up discrete sections for each filter. I've got both the
> Musical Engineers' Handbook and the Electronotes PCC at my disposal, as
> well as Chamberlin. Any help would be greatly appreciated.
> 
> Regards,
> 
> Proteus
> 
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