Pitch-shift effects add depth and texture to your grooves, and with the Boss Harmonist HR-2 pitch shifter guitar effect pedal, you have everything you need to pump up your sound. This harmonizer pedal works hard to keep you sounding good, and it offers four pitch-shift effects: harmony, pitch shifter, detune, and S-bend. The sound is rich and honest, and the guitar pedal features a selectable key and voicing mechanism that allows you to create harmonies using two or three voices. Rough up your sound with the pitch shifter's three-voice detune capability; all you need to do to is choose a major or minor key and switch the setting to three-voice mode. Featuring an optional expression pedal that allows you to control the pitch, this Boss pedal is your ticket to guitar glory.