The Live Harmony instantly adds up to two separate vocal harmonies to your vocals transforming your performances into harmony-filled masterpieces. Just plug a guitar and a microphone into the Vocalist Live Harmony, then start playing and singing this intelligent effects box takes care of the rest. Using patented musIQ® technology developed by DigiTech, the Live Harmony senses the chords you’re playing on guitar and adds correct natural vocal harmonies to your vocals. As you strum a different chord while you sing a sustained note, you’ll hear the harmonies change behind you just like a virtual team of backup singers.