Specifications

Chapter 5: DigiRack Real-Time TDM and RTAS Plug-Ins 69
open for longer periods of time with a single
crossing of the threshold. It can also be used to
prevent gate chatter that may occur if varying
input levels near the threshold cause the gate to
open and close very rapidly.
Decay Controls how long it takes for the gate to
close after the input signal falls below the
threshold level and the hold time has passed.
Range Sets the depth of the gate when closed. It
has a maximum depth of –80 dB. Setting the
gate to higher range levels allows more and
more of the gated audio that falls below the
threshold to peek through the gate at all times.
Key HPF This is a high-pass filter that removes
low frequencies in the Key Input signal. Use this
to define a specific frequency range of the Key
Input to trigger the Expander/Gate. A typical
use for this feature is to filter a drum track used
as a Key Input so that only specific high fre-
quencies (such as a snare drum) will open the
Gate.
Key LPF This is a low-pass filter that removes
high frequencies in the Key Input signal. Use
this to define a specific frequency range of the
Key Input to trigger the Expander/Gate. A typi-
cal use for this feature is to filter a drum track
used as a Key Input so that only specific low fre-
quencies (such as a kick drum or tom) trigger the
Expander/Gate. The maximum value for Key
LPF is Off. This lets the Key Input to pass
through without limiting its high-frequency
bandwidth.
Graph Displays the response curve set by the Ex-
pander/Gate’s Threshold, Ratio, and Range set-
tings. As you adjust these controls, refer to the
graph to see how the shape of this curve
changes.
LFE Enable Enables plug-in processing of the
LFE (low frequency effects) channel on a multi-
channel track formatted for 5.1, 6.1, or 7.1 sur-
round formats on some plug-ins. To disable LFE
processing, deselect this button. For more infor-
mation on the LFE channel, refer to the Pro Tools
Reference Guide.
External Key Enables and disables side-chain
processing. Side-chain processing allows the Ex-
pander/Gate to listen to the varying amplitude
of a separate reference track and use it to trigger
expansion. See “Side-Chain Processing” on
page 22.
Key Listen When enabled, this allows you to lis-
ten to the reference track controlling the side-
chain input. This is often useful for fine tuning
the Expander/Gate’s settings to the Key Input.
DeEsser
The DeEsser reduces sibilants (“s,” “sh,” and “t”
sounds) and other high frequency noises that
can occur in vocals, voice-overs, and wind in-
struments such as flutes. These sounds can cause
peaks in an audio signal and lead to distortion.
Key Listen is not saved with the other plug-
in settings.
DeEsser plug-in