PRESONUS AudioBox Stereo Quick Start Manual page 322

• Attack. Adjusts attack time for dynamics processing, reaction speed to falling signal.
Variable from 0.1 ms to 500 ms.
• Release. Adjusts release time for dynamics processing, reaction speed to rising signal.
Variable from 50 ms to 2s.
• Sidechain. Engage by clicking the Sidechain button at the top of the effect window to
allow other sources control the Expander.
o
Sidechain Channel Display. Displays the current sidechain channel source.
o
Internal Sidechain. Click to activate internal filter sidechain (for frequency-
dependent compression). Uses 48 dB filters.
o
Listen Filter. Click to listen to the filtered control signal of the internal
sidechain. This helps find a specific target frequency for the control signal
when de-essing, transient damping, etc.
o
LC/HC Freq. Frequency selection for internal sidechain filters. LC variable
from Off to 20 Hz to 16 kHz; HC variable from 20 Hz to 16 kHz to Off.
o
Filter Type Display. Shows notch or bandpass characteristic of filter.
o
Swap. Click to swap the frequencies used for LC and HC.
13.6.3 Gate
Gate is a noise-gate processor with range control. It features sidechain capability with an
internal sidechain filter that includes variable low cut and high cut. Gating is an extreme form
of expansion that severely attenuates the processed signal or silences it entirely. Use Gate to
eliminate unwanted noise or low levels in any track or to creatively control the level of a given
track using another track via the sidechain.
The following parameters are available for the Gate:
• Threshold.
o
Open. Threshold, adjust the level at which the Gate is to attenuate below. Variable
from -60 dB to 0 dB.
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