Audio to CV gate

[John E Blacet]

The typical path is a full wave rectifier/filter (envelope follower) and
a comparator with a variable trip point. You might also want a pulse
width circuit to vary the gate "on" time....and to not have the gate
"on" ALL the time the audio level is above the comparator trip point.
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Regards.
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John Blacet
Blacet Research Music Electronics
http://www.blacet.com
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blacet at metro.net