Ferocious Fuzz and Flexible Pitch Shifting in a Single Box
“Pitch before or after fuzz?” With the Keeley Octa Psi Transfigurating Fuzz, we’ve finally tackled this age-old dilemma once and for all. By merging your favorite pitch shifter, fuzz, and octave generator into a single pedal, you can conjure a range of sonic textures spanning doom metal to classic psychedelic rock and beyond. Polyphonic pitch shifting puts Up, Down, and Dual octaves in your hands for everything from simple harmonies to stacked fourths, diminished chords, or lush chorus modulation. At the same time, the Expression Pedal control enables real-time pitch bending. These effects are available to you in either All-Wet or Wet/Dry modes and are instantly switchable on the fly. The Octa Psi tracks fast, too, so your solos will never veer into glitchy, 8-bit territory. Finally, the Keeley Octa Psi Transfigurating Fuzz is packed into a rugged aluminum enclosure that looks sharp and is ready for gigging.
Related Videos: Octa Psi Transfigurating Fuzz Pedal with Polyphonic Pitch Shifting
Flexible footswitch controls
From switching up your sound in the studio to wild experimentation up onstage, the Octa Psi’s plethora of footswitch controls facilitates all manner of in-the-moment inspiration. First and foremost is the Octa Psi’s claim to fame — the ability to swap the order of the fuzz and pitch sections by simultaneously holding down both footswitches. Yet, a builder of Robert Keeley’s revered stature doesn’t stop there! Hold down the Fuzz footswitch to access the Octa Psi’s momentary mode, which is an excellent tool for outfitting a choice lick or melodic flourish with a touch of psychedelic flair. Furthermore, the Octa Psi allows you to shape the pitch section’s ramp speed by holding down the Octave footswitch and turning the Blend control.


Powerful pitch-shifting possibilities
Much more than your standard octave fuzz pedal, the Keeley Octa Psi delivers a full-fledged polyphonic pitch-shifting experience. This pedal’s Pitch knob sports myriad intervals to choose from, with a 3-way switch that allows you to set the pitches up, down, or in Dual mode for both ascending and descending power. Plus, even Sweetwater’s most discerning pitch pedal enthusiasts can’t help but be impressed by the Octa Psi’s superb tracking. Whether you’re seeking a traditional octave-up effect, harmonious perfect fifths, or sub-sonic 2-octave-down bass tones, the Octa Psi does it all without breaking a sweat.
Keeley Octa Psi Features:
- Combines fuzz, polyphonic pitch shifting, and octave effects into a single box
- Flexible design allows you to determine the effects order by holding down both footswitches: fuzz before pitch/octave or octave/pitch before fuzz
- Analog, transistor-based fuzz section boasts a thick and hard-hitting voice that cleans up beautifully when you roll down your volume knob
- Switch between an all-wet signal or a wet/dry blend with a double tap of the blend control
- Hold down the Fuzz footswitch to swap between momentary and latching octave/pitch shifter effects
- Momentary mode for in-the-moment experimentation
- Depress and hold the Octave footswitch to fine-tune the pitch section’s ramp speed time with the Blend control
- Offers a trio of pitch-shifting modes: Up, Dual, and Down
- 3-way Scoop/Punch/Psi switch provides powerful shaping over your signal’s bass response
- Heavy-duty angled aluminum enclosure
- Includes both a Remote jack and Control jack to seamlessly fit into any setup
- True bypass construction keeps your tone clean and uncolored when the pedal is disengaged
