Review | Electro Harmonix Pitch Fork – BK Pedal Reviews
Electro-Harmonix Pitch Fork Polyphonic Pitch Shifter Pedal (Demo by Bill Ruppert) - YouTube
Guitar Pedal X - GPX Blog - Electro-Harmonix Finally Releases Expanded and Presets-enabled Pitch Fork+ Dual-Voiced Polyphonic Pitch-Shifter and Harmonizer