The OC-20G Poly Octave by BOSS is a groundbreaking polyphonic octave pedal designed specifically for use with GK-equipped guitars. It allows for the assignment of octaves to various combinations of strings, making it possible to create unique sounds and simulate guitar/bass combos while leaving other strings unprocessed. This capability is complemented by onboard effects, including guitar simulations and distortion, providing a versatile sound palette for musicians. Its rugged dual-pedal design features simple, knob-based controls, ensuring ease of use during performances. The pedal supports chord playing while utilizing octaves, making it an ideal choice for those looking to expand their tonal range. Note that the use of an optional GK-2AH pickup or equivalent is required for operation.