Meet the new BOSS harmonist, with four intelligent pitch-shift effects and three-voice harmony in one convenient unit. Among the effect modes are Harmony, Pitch Shifter, and Detune, plus the all-new Super Bend for authentic pedal-bending effects and wild three- and four-octave pitch sweeps. You can even control pitch with an optional expression pedal. The harmony function is fast and simple to use, and supports a variety of interval patterns. Its easy to create rich, three-voice harmony: choose a major or minor key, and set SHIFT to 3-VOICEthats it! The PS-6 Harmonist is an unbeatable combination of superior sound quality, ease of use, and powerful pitch effects, all under one hood. 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 expression pedal (optional BOSS FV-500L/H or Roland EV-5).