Shake to start.
Normally with diodes for clipping protection there would be sharp clipping. However, with the addition of a resistor I can soften up the clipping to a mere damping. Too high of a resistance and it won’t provide the damping needed and the oscillations will just keep growing until the operational amplifier clipping will kick in. Here, I have the resistor fine-tuned to provide the softest dampening possible without letting it reach the operational amplifier limits.
