The Boss OC-3 is a singular octave pedal that affords the ability to pitch shift a specific frequency range. A useful application for this effect would be preserving the high end of the top three strings while pitch shifting the lower strings at least an octave down.
The OC-3 has three modes: Poly, Octave 2, and Octave Drive. It is compatible with both guitars and bass guitars, and features individual outputs for mix and direct out, meaning its signal can be split to alternate destinations.
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