[sdiy] Lopass Gate voltage range question

[David G. Dixon]

Simply increase the input resistor values leading from the CV pot and CV
input to the CV summer.  Looking at the schematic, I'm presuming these are
R3 and R5.  You could double or triple these values.  Try 470k for R3 and
330k for R5.  If these values limit the CV too much, then back off to, say,
330k and 220k.

> I've just completed 2 of Thomas White's lopass gates and am very happy
> with them.  They do however have far too much range in response to
> control voltage.  The offset pot goes through the entire audio range
> in about 1/4 turn and similarly, an LFO or envelope signal goes from 0
> to 100% with about 1/4 of the CV pot.  There is a trimpot in the CV
> part of the circuit though this doesn't seem to tame it much.  Does
> anyone know how to reduce the range over the CV for this circuit?