John Frusciante’s Moog CP-251 Control Processor

John began using the Moog CP-251 Control Processor during the Stadium Arcadium tour. He typically had two CP-251 units on his pedalboard.

The Moog CP-251 Control Processor is a utility module that allows you to shape and modulate sound by controlling various parameters of other Moog pedals or synthesizers, such as filter sweeps or modulation rates.