[sdiy] Shruthi 4PM (was re something else...)

[Jay Schwichtenberg]

I've been thinking about some sort of 'multiple identity filter' for a
while. I've looked at Olivier's, the Xpander's and the Craig Anderton's MIF
filter schematics and glanced at the math.

There is an experiment that I want to do to see if there might be a 'generic
approch' to implementing a filter with synth modules vs. having a deadicated
filter. I'll get around to building my TH/TP Mankato filter next year which
I would use as the filter core so it'll be a while before I can do this
(maybe someone else has, ideas, comments?). The other module that would come
into play would be the Blacet VCA2930 Super VCA (quad VCA, mixer, panner,
morphing) (http://blacet.com/BlacetUserPage/VCA2930user.pdf). The experiment
would be hook up the outputs from the Mankato (using inverted and
non-inverted as needed) to the Super VCA doing a mix for the filter output.
You could statically set the filter 'coefficients' or voltage control them
to generate the different types of filters.

Only thing so far I've seen that might be a problem is what Olivier
mentioned about the first filter stage being bypassed.

Ideas, comments?

Jay S.