The Efektor FZ3603 Fuzz is the grandfather of "artificial" effect units. Recognizable from its distinct sound, heavily clipped and compressed to the point where the waveform is squared, adding harsh and complex harmonics that are almost synth-like. The Efektor Fuzz plugin allows users to select from five fuzzbox modes. Big Fuzz provides a gritty and wooly sustaining note, Sustainer Fuzz delivers blistering rhythm and singing leads, Trans Fuzz is the familiar fuzzy transistor sound, Vintage Fuzz is the modern recreation of the sound from the '60s and Zepp Fuzz offers the vintage British rock sound old-school rock fans love.