Melodyne 4 is the first major update of this industry-standard pitch-and-time correction software application/plug-in in many years, but it was well worth the wait. Probably the most significant addition is a workflow one; the ability to correct multiple tracks simultaneously in a single screen. In previous versions you had to edit one track at a time, which could be time consuming, especially when dealing with lots of layered vocals.
Version 4 also adds a revamped tempo algorithm that allows you to take a song played without a click and quickly create one that follows the tempo fluctuations of the musicians. You can even sync up loops and other material with a constant tempo to a recording that was made without a click. Melodyne 4’s other amazing feature is its ability to edit overtones. You can now get inside of individual notes and adjust the level of individual partials. For sound design, especially, this opens up an entirely new world.