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MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Envelope/Envelope.kicad_pcb | 2 | | | | C10 | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x7 Pin socket, 2.54 mm, 1x4 | | R31 | 1 | 100k | Resistor | | J3, J4, J5 | 3 | 22k | Resistor | | | | | | | | | | Tayda | A-4349 | | | J1 | 1 | LED | Light emitting diode | | Tayda | A-804 | | J3, J4, J5 | 3 | A1M | Potentiometer | | | | | | | Tayda | A-1672 | | J9 | 1 | 10R | Resistor | | J9 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92"/>

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