In the next few days, we will have a Quad VCA/Mixer. It doesn't have a
zillion parts but works extremely well. For for a panel layout keep an
eye on the Blacet site.
There are a lot of ways to design VCAs; I suspect this one will be very
useful. I plan on a motm kit (panel guys, oh panel guys...).
Regards,
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John Blacet
Blacet Research
http://www.blacet.com