It's like having a studio full of on-pitch backup singers at your disposal. Simply select the key of the song from the front-panel keyboard and sing! It's easy to create hundreds of harmony styles from 50 different factory presets, each with 6 variations. Adds 2 harmony parts either above or below your lead vocal. Also includes an excellent reverb with switchable room types for creating instant ambience. Just plug your mic directly into your Performer, run the output to a mixing board, and go for it!