M306 Poly Blue Octave

The MXR M306 Poly Blue Octave is a versatile pedal that combines modern and classic pitch-shifting styles with fuzz and modulation, offering a wide range of sonic possibilities. Here are the technical specifications and features:

- The pedal is powered by a 9-volt AC adapter such as the Dunlop ECB003/ECB003EU or an MXR Brick Series power supply. It cannot be powered by a battery.
- The Poly Blue Octave features four separate octave divisions: one octave down, two octaves down, one octave up, and two octaves up, each with its own level control.
- The pedal is polyphonic by default, making it suitable for both chords and single note passages.
- It includes a Mono switch that provides monophonic tones reminiscent of analog-style pitch shifters, with warm vibes and raw personality for sub- octave signals and searing, synth-like tones for higher octave signals.
- Equipped with an unruly fuzz inspired by the classic MXR Blue Box Fuzz, the fuzz volume can be adjusted using the Dry knob after pressing and holding the Fuzz button.
- The Poly Blue Octave features a dual-mode modulation effect that provides an uncanny simulation of the famous Leslie effect in polyphonic mode and classic swirls and swooshes inspired by the Phase 90 in monophonic mode. The Mod knob adjusts the rate of the effect.
- Through the EXP jack, the pedal allows control of various settings with an expression pedal or an off-board switch to sweep between different knob and switch configurations or toggle the fuzz and mono modes on and off.
- The MXR Poly Blue Octave delivers high-performance pitch shifting, fuzz, and modulation in a ruggedly reliable housing with true bypass switching.

The pedal's controls include:
- EXP jack for use with expression pedal or tap switch
- FOOTSWITCH for toggling effect on/bypass (white LED indicates on)
- MOD knob for adjusting the rate of modulation effect
- DRY knob for adjusting the output level of the dry signal
- FUZZ switch for toggling fuzz effect on/off (blue LED indicates on)
- SUB-1 knob for adjusting the output level of signal shifted one octave down
- MONO switch for toggling between monophonic and polyphonic pitch-shifting modes (red LED indicates monophonic mode)
- SUB-2 knob for adjusting the output level of signal shifted two octaves down
- OCT+1 knob for adjusting the output level of signal shifted one octave up
- OCT+2 knob for adjusting the output level of signal shifted two octaves up

The MXR M306 Poly Blue Octave is a comprehensive pedal that offers a full palette of tones and textures in a single unit, making it a valuable addition to any signal chain.