Amazon.com: Koogo Harmonizer Digital Pedal Harmony Pitch Shifter Detune For Electric Guitar Bass With Storage Of Timbre Sound Pedal, LEF-3807 : Musical Instruments
Guitar Pedal X - GPX Blog - Electro-Harmonix's Intelligent Harmony Machine delivers a Neater and Smarter Harmonizer with Classic Pitchfork style Pitch-Shifting onboard too