BOSS VE-2 Vocal Harmonist PedalReal time vocal harmonies and high quality effects in an affordable, easy to operate pedal Auto Harmony function automatically detects chords played on a connected guitar and generates perfectly matching harmonies, even during mid song key changes Solo singers can create harmonies by manually setting the song key with a dedicated panel knob Hybrid mode creates harmonies based on both guitar chord input and the manual key setting, perfect for songs