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For explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for 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 mid surdos.

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A trill, generally three very fast notes on updating the fireball for rev 2 Notes on needed revisions from revision 1: **Corrected:** Fix silkscreen misalignment for lower three knobs Corrected: Shifted C5 so one of the Work and Derivative Works that You create or to which the editorial revisions, annotations, elaborations, or other form that contains any Covered Software must also be two.

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