Electro-harmonix's Pitch Fork polyphonic pitch shifter can turn your 6 string into a 12.... or even 18-string guitar, emulate a synth, and get some wild and unique tones without glitches. Choose between single note pitch shifting or dual note (one up and one down) pitch shifting. It works great with bass, too, giving your bottom end even more bottom, and jangle on the top! Dial in nearly any interval you desire and add an expression pedal for even more ideas. Throw a fuzz or distortion pedal in front of the Pitch Fork for synth-like tones and gritty lows.