Boss PS-6 Harmonist Pedal Four effect modes in one stompbox: Harmony, Pitch Shifter, Detune, and S-BEND (Super Bend) Easily create two- or three-voice harmonies with selectable key and voicing High-quality pitch shifting Three-voice Detune capability Super Bend provides up to four octaves of extreme pitch bending Control pitch via an expression pedal (optional BOSS FV-500L/H or Roland EV-5)