Provoc Grader is a special split-band compressor designed for vocals. It allows you to preserve as much natural dynamics as possible by letting you apply compression only to relevant frequencies if desired. This is done with an easy-to-use Range Selector which can be dragged vertically to adjust the width, or horizontally to adjust the position.

It has volume controls for Wet and Dry bands, Input and Output level controls, and a Dry Gain control for matching the volume of the raw vocals to the processed output for on/off comparison.