The BOSS OC-3 Super Octave gives guitarists high-quality octave effects with a single stomp. Three modes are provided, including a new Polyphonic Octave mode, a Drive mode with distortion, and the original OC-2 mode. The versatile OC-3 also works with bass! World's first compact pedal with true Polyphonic Octave effects New Drive mode adds distortion to octave notes for a fatter, more aggressive tone Includes the original OC-2 mode, capable of producing notes one and two octaves down Poly Octave effect adjustable to play within a specific note range Bass input for adapting octave sound to bass guitars