Waves Vocal Rider

A true timesaver, this plugin adjusts your vocal levels automatically, saving you the need to draw each level change in your DAW or manually ride faders.
All you need to do is set the target range of the vocal level in relation to the rest of the mix. Then, Vocal Rider compensates for all deviations from the target, intelligently raising or lowering the vocal gain, instantly. And unlike compression, Vocal Rider adds absolutely no coloring to the vocal track.

Vocal Rider also has a Live component with an exclusive Spill control to differentiate the vocal from background instrumentation and noise, for better tracking and performance.