Fairfield Circuitry 20% More Slew Limiting Distortion FX Pedal

The 20% More Slew Limiting Distortion from Fairfield Circuitry is based explorations of  a schematic found among old papers of mysterious origin.

These were suspiciously similar to a datasheet sq/tri oscillator, and Fairfield then proceeded to connect the dots to create the 20% More, which acts as a steep, somewhat distorted low pass filter, and a whole lot more.