“Air Shelf is a plugin designed to shape your (very) high end, mostly above 10kHz. Use the Boost knob to get more highs, and the Tame knob to keep high frequency transients under control.
- Boost : A 1st order high shelf centred at 20kHz, fully decramped up to 21kHz, with a very smooth and gradual response.
- Tame : A mix between a very fast dynamic EQ and a transient shaper. It means that it is NOT dependant on the input signal level and, contrary to a multiband processor, there are no crossoversinvolved while still only affecting (very) high frequency spikes.
Source : bertomaudio.com