This is a really well made parametric EQ VST plugin. Parametric EQ allows for much more flexible control, not only over the range "vertically" but also over the range of frequencies each control point affects and the precision with which is does so. It features 5 bands with excellent high and low frequency response.

 

This plugin was named Nyquist due to it's exceptional handling of typically difficult frequencies. The Nyquist frequency is the highest representable frequency for a given sample rate. The trebliest of the treble. Most other digital eqs have great problems producing a natural sound here.