Boss XS-1 Poly Shifter

With a brand-new algorithm and ultra-fast attack, the new XS-series Poly Shifter pedals preserve clarity, playing technique and the natural character of your instrument. Their polyphonic pitch shifting delivers flawless, glitch-free performance, whether you’re playing full chords or rapid melodic lines. Designed to sound natural, these pedals integrate seamlessly with other effects, while offering full support for bass frequencies.


The BOSS XS-1 Poly Shifter packs cutting-edge performance into a compact pedal. It offers natural pitch shifting across a wide six-octave range, from three octaves up to three down. With the Shift knob, you can quickly select intervals from one to seven semitones or one to three octaves. A Detune mode adds extra depth and richness, creating a doubling-style effect, while the Shift Up function provides convenient capo-like operation for changing key on the fly or for tapping-style performances. You can also emulate bass instruments on guitar by shifting down an octave, or craft harmonised solos and layered effects using semitone intervals.


For octave shifts, you can use the Balance knob to blend in the direct sound for 12-string effects, parallel guitar/bass sounds, and unexplored colours.


Extend the foot controls with an FS-5U, FS-6, or FS-7 to configure specific pitch-shifting settings or connect an expression pedal to continuously control the amount of pitch shifting.