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
Electro-Harmonix Intelligent Harmony Machine Pitch Shifter Effect Peda | The Music Zoo
The Guitar Sanctuary | Eventide | PitchFactor | Harmonizer Pedal
Electro Harmonix Intelligent Harmony Machine Harmonizer / Pitch Shifter - Town Center Music