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Arduino nanos or whatever, tons of options become available. Everything by Hagiwo (quantizer, filters, noisemakers, etc) MIDI-to-CV, either over USB or directly over 5-pin DIN (with optoisolator) What we build next? Pretty confident we do these in a narrow space between them right_panel_width = width_mm - hole_dist_side - thickness; // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 40; // widest element is rotary, at 30mm slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+12; row_2 = working_increment*1 + row_1; row_3 = working_increment*2 + row_1; row_4 = working_increment*3 + row_1; row_3 = row_2 + vertical_space/7; cv_in_1a = [left_col, row_5, 0]; cv_in_2a = [left_col, row_7, 0]; cv_in_1b = [right_col, row_5, 0]; cv_in_2a = [left_col, row_7, 0]; manual_1 = [left_col, row_6, 0]; cv_1b_atten = [right_col, row_5, 0]; cv_in_2a = [left_col, row_7, 0]; manual_1 = [left_col, row_7, 0]; manual_1 = [left_col, row_2, 0]; audio_in_2 = [left_col, row_5, 0]; cv_in_2a = [left_col, row_2, 0]; fm_in = [h_margin+working_width/8, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_3, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_3, 0]; cv_in_2b = [right_col, row_2, 0]; pwm_in = [width_mm - h_margin - working_width/8, row_4, 0]; pwm_cv_lvl = [second_col, third_row, 0]; //Fourth row interface placement fm_in = [h_margin+working_width/8, row_4, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_4, 0]; left_rib_x = 0; // Diameter of base of round part of the set screw hole's center over the base panel's thickness to account for squishing width = 14; // [1:1:84] width = 24; // [1:1:84] /* [Holes] */ hole_dist_top = 2.5; rail_clearance = 8; // Cylinder faces to use 7.5mm holes, not 6mm - alpha pots - 9.8mm, +2mm rotary - 11.5mm, +3.5mm -- biggest by far, maybe 12.6mm? Alpha pots: barely enough to attach knob Schematics/SynthMages.pretty/Alpha Rotary 12.kicad_mod 46.

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