Check the listing for details. Electro-Harmonix Intelligent Harmony Machine Harmony and Pitch Shifter Pedal. Condition: New. Listed at 241.50 USD. The Ultimate Harmony Generator The Electro-Harmonix Intelligent Harmony Machine is the perfect pedal to use when your guitar needs to occupy more space in the mix. This 2-in-1 harmonizer and polyphonic pitch-shifter pedal offers exceptionally smooth tracking for single notes and whole chords in all 12 keys. There are two principle operating modes: Intelligent Harmony Mode and Polyphonic Override Mode. Intelligent Harmony Mode offers up diatonically correct harmonies according to the set key; Polyphonic Override Mode engages a pitch-shifting function akin to Electro-Harmonix's classic Pitch Fork pedal. Each mode offers 11 different harmonization/pitch settings to choose from. Of course, the Intelligent Harmony Machine also includes a Momentary mode with adjustable sweep time.