Keeley Octa Psi — Pitch Shifter, Octave Generator & Analog Fuzz Pedal
A New Dimension of Pitch and Fuzz
The Keeley Octa Psi merges a polyphonic pitch shifter, octave generator, and analog fuzz into one expressive stompbox built for creativity and experimentation. Designed with flexible control and powerful sound shaping, Octa Psi lets you craft everything from soaring octave harmonies and glitchy pitch effects to massive, saturated fuzz tones — all with intuitive controls and performance‑ready features.
Powerful Polyphonic Pitch & Octave Engine
Explore harmonies and intervals across your playing with three pitch modes:
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Up Mode: Adds one or more octaves above your signal
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Down Mode: Adds lower octaves for deep, dramatic effect
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Dual Mode: Combines upper and lower octaves for rich, multi‑layered sound
These modes let you create everything from power chords and stacked intervals to creative multi‑octave bends. Octa Psi also supports momentary or latching pitch/octave control, giving you expressive options for dive bombs, swells, and dynamic performance effects.
Adjustable Ramp Speed lets you shape how the pitch bends over time — much like an expression pedal — letting you glide between notes with musical flair.
Transfigurating Analog Fuzz
Underneath Octa Psi’s advanced pitch features lies a high‑gain analog fuzz circuit driven by transistor stages for thick, saturated distortion. The three‑way tone switch lets you tailor your fuzz’s character:
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Scoop Mode: Classic fuzz with punchy mids removed
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Punch Mode: Balanced and aggressive with strong mids
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Psi Mode: Full, rich bass presence and harmonic complexity
This fuzz engine makes your guitar sound huge at any volume and pairs seamlessly with the pitch effects for wild tonal exploration.
Flexible Performance Features
Octa Psi is built for live play and creative control:
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Instant Effect Order Switching: Hold both footswitches to toggle whether pitch/octave comes before or after the fuzz circuit — a powerful tool for reshaping your tone on the fly.
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All‑Wet or Wet/Dry Output Blend: Double‑tap the Blend knob to choose between fully effected output or a mix of dry and effected signal for wide, immersive sound.
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True Bypass or Silent Buffered Bypass: Choose the routing that best suits your rig — buffered for strong signal integrity or true bypass for completely transparent bypassed tone.
Intuitive and Durable Design
Housed in a proprietary angled aluminum enclosure, Octa Psi is both road‑ready and easy to use. The layout keeps all critical controls within reach, letting you focus on expression and sonic exploration without menu diving.
Built for Sonic Innovation
With its combination of polyphonic pitch shifting, octave manipulation, and classic analog fuzz, Octa Psi expands your creative toolkit. Whether you’re adding subtle harmonic color, generating massive multi‑octave textures, or smashing your signal with rich fuzz, this pedal opens up new sound worlds for guitarists and experimental players alike.
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