Boss OC-5 Polyphonic Guitar & Bass Octave Effects Pedal

The Boss OC-5 is a next-generation octave pedal designed for players who want classic low-end character, modern tracking accuracy, and greater creative flexibility in one compact stompbox. Built for both guitar and bass, it combines the iconic sound and feel of vintage Boss octave effects with advanced polyphonic performance, making it easy to create everything from thick, punchy riffs to full, harmonically rich chordal textures.

Two distinct operating modes give the OC-5 impressive tonal range. Vintage mode captures the familiar response and character of classic mono octave sounds, perfect for traditional sub-octave lines and old-school analog-style tone. Poly mode expands the pedal’s capabilities with highly accurate note tracking for chords and more complex playing, allowing you to add octave depth and shimmer with clarity and control. Dedicated octave-up and octave-down controls help shape everything from subtle reinforcement to bold, dramatic textures.

The OC-5 also includes a Range function that lets you apply the octave effect only to lower notes, which is especially useful for adding bass-style foundation under chords or preserving clarity in mixed-register playing. A dedicated Guitar/Bass switch further optimizes the pedal for different instruments and playing styles, making it a versatile option for guitarists, bassists, and multi-instrumental performers.

Housed in Boss’s trusted compact pedal format, the OC-5 is built for reliable performance on stage, in the studio, or at home. Its flexible feature set, strong tracking performance, and wide tonal range make it an excellent choice for musicians looking to add depth, power, and creative octave textures to their setup.