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MS-20. ** 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 Envelope/Envelope.kicad_pcb | 2 | 10R | Resistor | | | R1, R2 | 2 pin Molex connector | | R8, R10, R12 | 3 | 2_pin_Molex_header | 2 | 1 | SW_DPDT_x2 | Switch, single pole double throw, separate symbols 2x5 pin shrouded header 2.54 mm spacing Pin header 2.54 mm spacing KK254 Molex connector 2 pin Molex header 2.54 mm spacing D Switch, single pole normally-open tactile switch SPST right angle, PTS645VL31-2 LFS tactile switch SPST right angle, http://spec_sheets.e-switch.com/specs/P040042.pdf E-Switch sub miniature slide switch, vertical, SMT J bend https://dznh3ojzb2azq.cloudfront.net/products/Slide/JS/documents/datasheet.pdf MEC.

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