Electro Harmonix Intelligent Harmony Machine Harmonizer/Pitch Shifter Effect PedalElectro Harmonix's endless arsenal of effect pedals seems to know no limits. With such an extensive catalog, the Electro Harmonix Intelligent Harmony Machine makes for another EHX classic. The Intelligent Harmony Machine creates matching harmonies in real time while you play. With eleven two and three part harmonies to select from after dialing in your key, this micro titan of an effect pedal creates symphonies from single notes and licks. In