Korpa 
Meet the BOSS PS-6 Harmonist effects pedal, 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. With the PS-6 Harmonist, 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. It's easy to create rich, three-voice harmonies: choose a major or minor key, and set the Shift to 3-VOICE—that's it! The PS-6 Harmonist is an unbeatable combination of superior sound quality, ease of use, and powerful pitch effects, all under one hood.
Higher Sound Quality
The BOSS PS-6 Harmonist is the new-generation pedal for harmony shifting. Sound quality has been improved dramatically thanks to its powerful DSP. With the PS-6, you can render complex harmony voicings beautifully, naturally, and easily.
3-Voice Harmony, Detune, and Pitch-Shift
The PS-6 Harmonist can generate two or three voices, such as direct/third/fifth, in each of the following modes: Pitch Shifter, Detune, and Harmony. This will add rich depth to your guitar sound. Detune broadens the sound in a natural way, as the PS-6 allows 3-voice detuning with slightly raised and lowered pitch added to the direct signal. Voices can also be pitch-shifted one octave up and a fifth below your note—great for arpeggio-style playing, for example.
Super Bend
This amazing effect bends pitch across a 7-octave span, from -3 to +4 octaves! Set the Rise and Fall time to your taste. You can control the bending effect in real time with the pedal's knob or from an external pedal such as Roland's EV-5 Expression Pedal (sold separately).
Easy Operation
Manipulate a wide variety of effects using simple operations. In Harmony mode, for example, all you have to do is select the key, specify whether it's major or minor, and use the SHIFT knob to select the voicing you want to use. The Shift knob switches between the different pitch settings available in each mode.
Road-Tough BOSS
BOSS compact pedals are world-famous for their great sound as well as their road-tough construction, consistency, and reliability. The PS-6 inherits this BOSS-proven design, offering guitarists a solidly constructed pedal that's built to withstand decades of demanding use.
