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Schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the cylindrical edge of the potentiometer pads and trace routing to de-bodge the pots. D5bfb6e27b 's notes on repique/caixa, two or three for surdos main synth_tools/3D Printing/Pot_Knobs/Pot Knob in Two Parts.stl synth_tools/Schematics/SynthMages.pretty/Alpha Rotary 12.kicad_mod Normal file Unescape.

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