The EHX C9 Organ Machine has nine presets that allow the player to select among popular organ types and pay homage to tones made famous by Keith Emerson, Ray Manzarek, Jon Lord, the Beatles, Led Zeppelin, and more. Its Organ Volume knob controls overall volume of the organ preset while Dry Volume controls the volume of the untreated instrument level. The Mod control adjusts speed of the modulation, while Click controls the percussive click level or a parameter unique to the preset such as upper harmonic level or modulation. Learn more at www.ehx.com.