Antares DueDoubling is one of the best techniques for fattening up a lead vocal or giving it extra depth. And Duo is the easiest way to enhance vocals with a realistic doubled vocal partautomatically generated from your existing vocal. In addition to programmable variation in pitch, timing and vibrato depth, Duo includes adjustable vocal timbre modeling, so you can create a doubled part that sounds like the same person as the lead vocalistor like someone else