[sdiy] multimode matrix filter question

[David G. Dixon]

> I assume this is a typo/terminology thing - no input?

No, it's not a typo.  This module will be connected directly to my 2164 4P
LPF behind the panel.  It will also have no LP outputs (unlike the Xpander),
as these are already available on the LPF panel.

> I think your idea of post-processing with (inverting?) mixers is fine -
> also adding the option of weird feedback options and all voltage
> controlled if/when that takes your fancy. As long as the partner mixer
> has the ability to boost as required, not just attenuate.

These are just going to be simple outputs (like any other filter).  I was
just wondering about what gain levels to build into the actual matrix
circuit, since some of the derived filter modes are naturally much quieter
than others.