The PitchFactor Harmonizer pedal gives you Eventide's 10 best pitch-changing effects from the past 36 years without compromising quality or flexibility. This plug-and-play expression pedal gives you control over the wet/dry mix or any combination of parameters. Control program changes and vary parameters continuously via MIDI. The Pitchfactor Harmonizer supports instrument or line-level inputs and outputs. The Eventide PitchFactor plays well with others and adapts seamlessly with a wide variety of amps and other foot pedals. The Eventide PitchFactor Harmonizer Pedal is also easy to upgrade—you can download new software from the internet and install via USB.. The PitchFactor Harmonizer pedal gives you Eventide's 10 best pitch-changing effects from the past 36 years without compromising quality or flexibility. This plug-and-play expression pedal gives you control over the wet/dry mix or any combination of parameters. Control program changes and vary parameters continuously via MIDI. The Pitchfactor Harmonizer supports instrument or line-level inputs and outputs. The Eventide PitchFactor plays well with others and adapts seamlessly with a wide variety of amps and other foot pedals. The Eventide PitchFactor Harmonizer Pedal is also easy to upgrade-you can download new software from the internet and install via USB.