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And rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Latest commits for file Datasheets/tl074-pinout.jpeg From a704d3e530a1af53937ba04c8656790dad735ad7 Mon Sep 17 00:00:00 2001 Subject.

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