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BackExpensive 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 supporting components. ~$6 in parts, needing only one tl074 and support Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM.
- And b/3D Printing/AD&D 1e spell.
- HLE-112-02-xxx-DV-BE, 12 Pins (http://www.molex.com/pdm_docs/sd/908140004_sd.pdf.