The Best Harmonizer Pedals to Turn Your Guitar & Vocals Into a Lush Choir
Amazon.com: Koogo Harmonizer Digital Pedal Harmony Pitch Shifter Detune For Electric Guitar Bass With Storage Of Timbre Sound Pedal, LEF-3807 : Musical Instruments
TC Electronic Announces the Quintessence Harmonizer - Premier Guitar
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