Shift: This sets the initial crossover distortion amount by offsetting the positive and negative peaks to their opposites.
Bias-X: Adds harmonics to the signal with another stage of cross-over distortion. The harmonics are sweepable.
CV: The Bias-X can be voltage controlled.
Level: Boosts and cuts the output signal. Center is unity.
Lowpass: A passive lowpass to the incoming signal. Helpful with square waveforms, that are usually absent of of a defined crossover point to the signal.
