The electro harmonix intelligent harmony machine harmony pitch shifter is a compact powerhouse that instantly creates harmonies to match your playing. With impeccable tracking and superb musical tone it offers two distinct modes intelligent harmony and polyphonic. In intelligent harmony mode it generates diatonic harmonies based on the single notes you play while in polyphonic override mode you can play single notes and chords. The mix control allows you to blend your dry and shifted signals and the momentary mode lets you control the pitch shift with the footswitch. It comes with an ehx 9 volt power supply and can also run on a 9 volt battery. The intelligent harmony machine is perfect for a range of scenarios from playing complete harmony lines to creating multi lead guitar parts. Create complex sounds with ease and take your music to the next level. Get creative with the electro harmonix intelligent harmony machine harmony pitch shifter!