[sdiy] 4-pole SSM2164 filters [was: Roland System 700 VCF]

[Tom Wiltshire]

On 11 Jul 2010, at 07:30, <lanterma at ece.gatech.edu> wrote:

> 
> On Jul 11, 2010, at 12:27 AM, Jared Hahn wrote:
> 
>> Do you know of a circuit to build the 2164 into a switchable Multimode filter? 
> 
> Do you mean like on the Oberheim Xpander and Matrix-12? You can do that with any of these four-pole-cascade designs:
> 
> http://www.musicsynthesizer.com/Circuitry/Multi-Function%20VCF.htm
> 
> Grant's website is coming in handy this evening. :)


Marc Bareille's Papareil Synth Labs has one too:

http://m.bareille.free.fr/modular1/vcf_multimode/extrapole.htm

This was set up to use the MOTM 440, but any other similar 4-pole filter would do - like the SSM2164 version we're discussing.

Regards,
Tom