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Leveled up.

The Poly Blue Octave features four separate octave divisions—one  octave down, two octaves down, one octave up, and two octaves up—and you  get to control the level of each in the mix. Each is polyphonic by  default, which means they sound just as amazing with chords as they do  with single note passages. Your dry signal gets its own level control,  as well, so you can dial in the perfect blend of pitch-shifted tones.

From contemporary clarity to raw vintage grit.

The Mono switch takes you back to the gritty, monophonic tones of  analog style pitch shifters. In this mode, the sub-octave signals have  the warm vibes and raw personality of a pedal such as the MXR Vintage  Bass Octave, while the higher octave signals resemble the Octavio Fuzz  with its fuzz intensity dialed all the way back.

Call up the thunder and lightning.

The Poly Blue Octave comes equipped with an unruly fuzz that’s  inspired by the classic MXR Blue Box™ Fuzz. Applied to all five signals,  the fuzz volume can be adjusted using the Dry knob after pressing and  holding the Fuzz button. When used with the sub-octave signals, the fuzz  sounds thick and subterranean. Over the higher pitched signals, the  fuzz is searing and synth-like. Run them all at the same time for a  choir of thunder and lightning.

Phase yourself.

For infusing your octave tones with an alluring sense of motion, from  thick and syrupy to frenzied and frantic, the Poly Blue Octave features  a dual-mode modulation effect. In polyphonic mode, the effect provides  an uncanny simulation of the famous Leslie effect, and while In  monophonic mode, it provides classic swirls and swooshes inspired by the  Phase 90. Like the fuzz effect, the modulation applies to all five  signals when engaged. The Mod knob adjusts the rate of the effect—when  you want it off, just roll the Mod knob back fully counterclockwise.

Step up and take control.

Through the EXP jack, the Poly Blue Octave allows you to control  various settings with an expression pedal such as the Volume (X)™8 Pedal  or an off-board switch such as the MXR Tap Tempo Switch to sweep  between two different knob and switch configurations or toggle the fuzz  and mono modes on and off.

A full palette of tones and textures in a single pedal.

The MXR Poly Blue Octave delivers high-performance pitch shifting,  fuzz, and modulation in a ruggedly reliable housing with true bypass  switching. Put this into your signal chain, and open up new sonic  frontiers.