The High Frequencies section provides controls that let you shape the tonal spectrum of the reverb by adjusting the decay times of higher frequencies.
Adjust the Time control to decrease or increase the decay time for mid- to high-range frequency bands. Higher settings provide longer decay times and lower settings provide shorter decay time. With lower settings, high frequencies decay more quickly than low frequencies, simulating the effect of air absorption in a hall.
Adjust the Frequency control to set the frequency boundary between the mid- and high-range frequency bands.
The High Cut control lets you adjust the frequency for the High Cut filter (1.00–20.0 kHz). Adjusting the High Cut control to change the decay characteristics of the high frequency components of the Reverb. To cut the high-end of the processed signal, lower the frequency.