The keeley electronics octa psi pitch shifter and octave fuzz is a powerful combination of polyphonic pitch shifting octave generation and analog fuzz in one intuitive pedal'. '.strtoupper('w')ith a versatile design it allows players to seamlessly switch the effect order toggle between momentary and latching modes and experiment with a wide range of fuzz voicings from scoop to punch and psi.featuring an all analog transistor based fuzz circuit the octa psi delivers thick gain heavy tones that are perfect for hard clipping and aggressive sounds'. '.strtoupper('i')ts polyphonic pitch shifter provides three modes—up down and dual—unlocking a variety of harmonic possibilities across a two octave range'. '.strtoupper('h')oused in a rugged angled aluminium enclosure this pedal combines durability with sleek design for both studio and live use.