Cgs synth

> A quick answer ....

Thanks for it!

> >Would I be better off using a simple op-amp summer to add the
> >three control voltages and apply their sum to the base of the

transistor

> >instead?
>
> Yes, but still keep the 220k in series with the base (i.e. use a CGS04
> circuit, with its output fed into a CV input on the Steiner).

Understood. For starters I'm going to take out the FREQ control stuff
altogether and feed a variable voltage through the 220K resistor, so
that I can determine the effective CV range for varying the filter
from 20Hz to 20kHz (more or less). Then I can build the necessary
voltage scaling into the new CV mixer so that it plays nicely with my
MOTM modules.

This is a really cool-sounding filter! The effects it can create by
feeding it two or three different signals are just wild.

--Adam