With 4 separate octave voicings: 1 octave down, 2 octaves down, 1 octave up, and 2 octaves up, the Poly Blue Octave allows you to control the level of each in the mix. Each is polyphonic by default, which makes them fantastic whether playing single-note licks or complex chord shapes. The dry signal also has its own level control so you can dial in the ultimate mix of pitch-shifted tones. FROM CONTEMPORARY CLARITY TO RAW VINTAGE GRIT. Use the Mono switch to return to the dirty, monophonic glitchiness of classic analog pitch shifters. In this mode, the sub-octave signal carries the warm, vibrant, and raw character of a pedal like the MXR Vintage Bass Octave, while the higher octave signal resembles Octavio fuzz it's the fuzz intensity at low settings. CALL UP THE THUNDER AND LIGHTNING. The Poly Blue Octave features a rowdy fuzz, inspired by the classic MXR Blue Box™ fuzz. Applied to all 5 signals, the fuzz intensity can be dialed with the Dry knob after holding the fuzz button. When used with the sub-octave signals, the fuzz sounds fat and larger-than-life. Using higher octaves, the fuzz resembles a scorching synth. Run them all simultaneously for a chorus of lightning and thunder. PHASE YOURSELF. Poly Blue Octave features a dual-mode modulation effect that adds a tantalizing sense of movement to octave tones, from fat and gooey to wild and chaotic. In polyphonic mode, the effect offers an accurate simulation of the famous Leslie effect, while in monophonic mode it offers classic Phase 90-inspired swirls and sweeps. Similar to the fuzz effect, when active, the modulation is applied to all 5 signals. The Mod knob sets the rate of the effect. If you want it off, roll the mod knob all the way counter-clockwise. STEP UP AND TAKE CONTROL. Via the EXP jack, Poly Blue Octave allows you to control different settings using an expression pedal like the Volume (X)™8 Pedal or an external switch like the MXR Tap Tempo Switch to switch between two different knob and switch configurations, or switch Fuzz and Mono modes on and off. A FULL PALETTE OF TONES AND TEXTURES IN A SINGLE PEDAL. The MXR Poly Blue Octave offers powerful pitch shifting, fuzz and modulation in a robust and reliable package with true bypass circuitry. Add this to your signal chain and push the sonic boundaries. Specifications Input Impedance: 1MO Output Impedance: 100O Maximum Input Level: +5dBV Noise Floor: -97dBV Current Draw: 265mA Power Supply: 9V DC