Featuring automatic backing harmonies, vocal double tracking, EQ and compression, as well as lush reverbs and many other effects, the VoiceLive Play has studio quality effects and production available as a stomp-box for live performances. With an AUX In connector, you can sing along to your MP3 player, and with the Vocal Cancel feature your voice can stand out over the vocals on the original track. Add to that a Practice mode, which listens to your performance and highlights weak points - you can improve all aspects of your singing.