The BOSS PS-6 Harmonist, with four intelligent pitch-shift effects and three-voice harmony in one convenient unit. The harmony function is fast and simple to use and supports a variety of interval patterns. It's easy to create rich, three-voice harmony. What's your favourite setting? #boss #bossps6 #ps6 #bossharmonist #harmonist #harmonypedal #pitchshifter #pitchshifterpedal #guitarpedal #bosspedals #guitarpedals #pedalboard | BOSS