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If going digital ** https://note.com/solder_state/n/nde97a0516f03 and https://www.youtube.com/watch?v=op_DhPr2goc ** arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a timely manner, at a 10-step panel layout Based on designs from: Skull & Circuits (https://www.skullandcircuits.com/vca-1-2/ Moritz Klein (and derivatives 1 0 22.0001 vertex -5.37835 0 22.0001 vertex -4.47193 2.98805 22.0001 vertex 5.37835 0 22.0001 vertex -1 6.84708 8.58432 vertex -1 6.37595 12.8553 vertex -1 6.34847 12.858 vertex 1 6.28946 13.3638 vertex -1 7.26455 7.25222 vertex -1 3.18579 20.5 vertex -0.95 6.11494 21.5472 vertex -0.95 0 20.5 facet normal -3.677414e-02 4.257209e-03 9.993145e-01 vertex -1.070916e+02 9.695134e+01 1.153720e+01 facet normal -0.768426 0.630721 0.108223 facet normal 0.231109 -0.464148 0.855076 facet normal -0.0822333 0.0819177 -0.993241 facet normal 0.920081 0.0458278 0.389038 facet normal -9.527803e-01 3.036606e-01 0.000000e+00 facet normal 8.314790e-01 -5.555561e-01 -3.197452e-04 vertex -9.151814e+01 9.473923e+01 1.055000e+01 facet normal 0.828719 -0.0816185 0.553682 facet normal 0.747983 0.192821 0.635092 facet normal 0.97743 0.186463 0.0993086 facet normal -0.654326 -0.271035 0.705973 vertex 6.45265 -0.325107 19.4867 vertex 6.7142 0.75193 19.8418 vertex 2.04556 -0.765005 19.9 facet normal -0.683022 -0.618138 0.389083 facet normal 1.398071e-01 -9.901787e-01 3.531486e-04 facet normal -9.901788e-01 -1.398071e-01 -0.000000e+00 vertex -1.081512e+02 9.715134e+01 1.136574e+01 vertex -1.078909e+02 9.695134e+01 1.143935e+01 facet normal 0.767816 -0.634378 0.0895789 facet normal -4.084597e-01 9.127763e-01 -9.306122e-05 facet normal 3.562770e-001 -6.107933e-001 7.071056e-001 facet normal 4.493219e-01 -7.207481e-03 8.933408e-01 facet normal 0.172853 0.0221096 0.984699 facet normal 0.768469 0.630673 0.108201 facet normal 2.353365e-004 -4.034553e-004 -9.999999e-001 facet normal 0.0825968 -0.0807457 0.993307 vertex 5.59382 -4.18518 7.89166 facet normal 0.964141 -0.255892 -0.0703715 facet.

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