[sdiy] 'State-Variable' vs. 'Multi-Mode' filters - differences?

[Lanterman, Aaron]

On Jul 4, 2012, at 12:44 PM, David G Dixon wrote:

> I recently took a slightly different approach with my dual
> 12-dB Korgasmatron filter, and used multiple input points (into the first
> state, the second stage, the resonance feedback loop, and the output amp) to
> derive six different modes.  The beauty of this scheme is that different
> input signals can have different filter responses through the same filter at
> the same time.  This approach is possible with other filters as well.


I recall the Synthacon VCF does that: 

http://www.cgs.synth.net/modules/cgs35_syntha_vcf.html

- Aaron