Keeley Electronics Octa Psi Transfigurating Fuzz Effect PedalThe Keeley Electronics Octa Psi Transfigurating Fuzz is a mysterious, black box of outrageous sound and deep functionality. Straight from the masterminds at Keeley, this pitch black tablet of tone delivers on many fronts for a versatile and musical fuzz and pitch effect combo for anyone to really sink their teeth into. Pitch altering fuzz is the name of the game for the Octa Psi. Those seeking a powerful pitch shifter, octave generator or analog fuzz