Schlappi Engineering Angle Grinder Quadrature Oscillator + Waveshaper (Silver)

Angle Grinder is a quadrature sine wave oscillator, filter, and waveshaping effect. The SPIN section is a quadrature sine wave oscillator. The GRIND section compares each phase against input signal, then subtracts the result from the input signal. If the spin section is either damped or enough signal is fed into it from the grind section then it will stop oscillating and become a state variable filter (of sorts).