Specifications
Chapter 5: DigiRack Real-Time TDM and RTAS Plug-Ins 47
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 “Using a Key Input for Side-
Chain Processing” on page 16.
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.
The DeEsser reduces these unwanted sounds us-
ing fast-acting compression. A Threshold con-
trol sets the level above which compression
starts, and a Frequency control sets the fre-
quency band in which the DeEsser operates.
Using De-essing Effectively
To use de-essing most effectively, insert the
DeEsser before compressor or limiter plug-ins.
Because too much de-essing can make audio ma-
terial sound lifeless, it is best used on individual
tracks rather than entire mixes.
The Frequency slider should be set to remove
sibilants (typically the 4–10 kHz range) and not
other parts of the signal. This helps prevent de-
essing from changing the original character of
the audio material.
Key Listen is not saved with the other plug-
in settings.
Expander/Gate settings created in version
5.x and later of Pro Tools are not compati-
ble with earlier versions. Saving a session in
a pre- 5.x format will cause settings to be
lost.
DeEsser plug-in
The DeEsser is a monophonic-only plug-in.