The Heart of the Beast: 2 digital square wave oscillators feed a XOR gate.
The XOR gate is then treated by a dual transistor Wave Shaper / Distortion / Filter circuit.
The wave shaper section can go into self oscillation. There is a CV input for the Gain and Bias controls. The middle section of the device is the power section, complete with power starve and a power feed touch sensor + some extras..
Now in my Etsy shop!