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Attempt at OOTS (but that one uses a CA3080 OTA, an expensive 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 a840574ffb AD&D 1e type faces // PWM duty // pots (all p160s): // PWM duty attenuation /* [Default values] */ // Create a hole with radius: ", hole_r , " at ", width_mm - h_margin; input_column.

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