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And support Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an arduino nano (other options probably fine), two 74HC595 shift registers (accidentally a pile in my collection) and the coarse knob to fix tuning range updates the potentiometer pads and trace routing to de-bodge the pots. 's notes on updating the fireball for.

New Pull Request