You can control the tone with the optional expression pedal. The harmony function is quick and easy to use, it also supports a variety of interval patterns. It's easy to create rich three-voice harmonies; choose a major or minor note, and program the SHIFT to 3-VOICE - that's it!

The PS-6 Harmonist is a combination of superior sound quality, ease of use and powerful in-flip effects, all under one roof.

The PS-6 is the new pedal generation for harmony changes. The sound quality has improved dramatically thanks to the DSP that is unmatched in power. With the PS-6 you can tenderizer complex harmonies beautifully, naturally and easily; You can generate two or three voices, such as direct / third / fifth in each of the following modes: Pitch shifter, Detune and Harmony. That provides a rich depth to the sound of your guitar.

• Detune in some way widens the natural sound, as the PS-6 allows 3-voice tuning with a small increase in tone added to the direct signal.
• Voices can also change tone one octave up and one down your note - excellent for arpegiarizing.
• Manipulate a wide variety of effects using simple operations.
• The PS-6 inherits the proven BOSS design, offering guitarists a solid pedal that is built to withstand decades of demanding use.
• Four effects modes on a single pedal: Harmony, Pitch Shifter, Detune, and S-BEND (Super Bend)
• Easily create two or three voice harmonies with selectable note.
• High quality tone change
• Three-voice Detuning Capability
• Super Bend mode provides up to four octaves of tone flexion.
• Tone control via expression pedal (optional, sold separately)
• BOSS warranty for 5 years

• Nominal Input Level: -20 dBu 
• Input Impedance: 1 M ohm 
• Nominal Output Level: -20 dBu 
• Output Impedance: 1 k ohm 
• Recommended Load Impedance: 10 k ohm or greater 
• Power SupplyDC 9 V: Carbon-zinc battery (9 V, 6F22); Alkaline battery (9 V, 6LR61); AC Adaptor (optional)
• Current Draw : 45 mA (DC 9 V)
• Expected battery life under continuous use: Carbon: 2 hours; Alkaline: 8 hours
• These figures will vary depending on the actual conditions of use.

Accessories:

• Owner’s Manual,  Alkaline battery (9 V, 6LR61)
• Options: AC Adaptor (PSA series)
• Expression Pedal:  EV-5 (Roland), FV-500L/FV-500H 
• SIZE AND WEIGHT ( INCL. BATTERY ) 
• Width: 73 mm; 2-7/8 inches 
• Depth: 129 mm; 5-1/8 inches 
• Height: 59 mm; 2-3/8 inches 
• Weight: 440 g; 1 lbs.