By Magnus @ Smart Electronix.

NyquistEq is a paragraphic equalizer that does not suffer from the treble warping that most digital equalizers do. Also it never clicks, and it handles deep bass well.

The reason it's called NyquistEq is because it's designed to be a filter that sounds good all the way up to the Nyquist frequency (if sampling rate is 44.1 kHz then nyquist is at 22.05 kHz).