[sdiy] Filter Musings

[David G. Dixon]

> I was going through a variety of schematics for ladder filters (Moog and
> the diode spin-offs) and was wondering what would happen if you put two or
> more of the filter "cores" in parallel in the circuit. Would it just be
> like having multiple filters controlled by the same CVs, or would it add
> poles to the filter? Is this just a silly question like my "More-Pole
> Filter" post a while back?

I think you would simply have two identical filters in parallel outputting
two identical responses, just like if you patched the same output to two
separate filters with the same settings.  In other words, nothing special.

Now, if you put the filters in series, then you would have a single filter
with twice the poles.  In fact, this is exactly how higher-order filters are
built.