[sdiy] Fun things to do with a half SSM2164?

[Olivier Gillet]

Hi all,

I'm developing various filter boards for my Shruthi-1 project
(http://mutable-instruments.net/shruthi1). The filter board receives
the audio signal with the digital oscillators mixed, and five 0-5V CVs
(the first 3 of them assigned to cutoff, resonance, VCA gain). So far
I have designed boards for a LM13700-based 4-pole+VCA ; and for the
CEM3379.

The board I'm working on at the moment uses a SSM2044 as a filter, and
the final VCA is a "linearized" SSM2164. So I have two log gain cells
available for an additional CV-controlled processing to be determined.
I don't want to add a lot of parts, at most a dual op-amp. What would
you suggest?

Olivier