MXR Poly Blue Octave Pedal Features:

• 4 separate octave knobs that can be run simultaneously: 1 up, 2 up, 1 down, 2 down
• Dry level control to mix in your regular signal with pitch-shifted tones
• Polyphonic design means that chords will sound just as good as single notes
• Mono switch offers a vintage and gritty analog-style sound
• Built-in fuzz that’s inspired by the MXR Blue Box
• Dual-modulation circuit that mimics a classic Leslie-style sound in poly mode; mono mode offers sounds inspired by the MXR Phase 90
• EXP jack to connect an outboard expression pedal
• Tough metal housing with a true-bypass switch