The MXR Poly Blue Octave is a powerful and versatile effects pedal that blends classic and modern pitch-shifting with rich fuzz and dynamic modulation, all in a compact, road-ready design. It features four independent octave voices—one and two octaves up and down with adjustable levels, plus a dedicated dry mix for dialing in the perfect blend. By default, all pitch effects are polyphonic, delivering rich, chord-friendly tones, but a Mono switch lets you switch to gritty, vintage-style analogue sounds. A built-in fuzz circuit, inspired by the iconic MXR Blue Box, adds everything from deep, rumbling textures to searing, synth-like tones across all pitch voices. The dual-mode modulation effect adds swirling movement, ranging from Phase 90-style sweeps to Leslie-like rotary textures, further expanding your creative palette. Expression pedal and tap tempo compatibility offer even more real-time control, while true bypass ensures your core tone stays intact. Whether you're chasing ambient layers, thick lead tones, or experimental textures, the Poly Blue Octave opens the door to endless sonic exploration. Oxygen Music stocks a great range of MXR pedals including the Poly Blue Octave Pedal.