Fuzz: Turning this control clockwise creates more dirt.
Tone: Darker and scooped tones clockwise. Brighter and more open tones counter-clockwise
Level: Adjusts the output volume.
Voice: Three way toggle switch which selects the clipping style:
Mode 1 – Germanium clipping. This produces a more open and looser fuzz.
Mode 2 – Silicon clipping. This produces a tigher, more compressed fuzz.
Mode 3 – Open, pure transistor drive. This produces a nearly clean octave-up effect and creates a sound very similar to ring modulation