The Octa Psi from Keeley is a pitch-shifter, octave generator and analog fuzz all in one pedal. A dual effect designed to inspire musical adventuring, this all-analog fuzz and distortion features a powerful transistor design that will make any bass or guitar pickup sound massive. The fast tracking polyphonic pitch-shifter offers a symphony of sounds to explore. On-the-fly commands include switching the effects order, going all-wet and even True bypass to Buffered Bypass modes. Plug in for remote use or use a TRS Expression Pedal to control the pitch bending parameters and dive-bomb your heart out.