Q3D is an emulation of NTI Nightpro EQ3D rack mount equalizer. This 6 band eq has an extremely wide Q. One of the bands is AIR that is a hi shelf filter. You can change the AIR frequency and boost. It has a modern, easy-to-use user interface. In the past, it has been used for very famous recordings and generally for Vocals.
Q3D features six bands. The first four peaking bands have the center frequencies 10 Hz (SUB), 40 Hz, 160 Hz and 650 Hz. Each band is 2.5 octaves wide. The fifth high-frequency shelving band has a cutoff frequency of 2.5 kHz.
The sixth "air" band is a -boost only- high-frequency shelf with five selectable cutoff frequencies:
The amount of boost or attenuation is continuously variable from -15 dB to 15 dB on all bands except the air band which has an amount of boost that is continuously variable from 0 dB to 20 dB: