Specifications
DigiRack Plug-ins Guide76
Use this graph as a visual guideline to see how
much dynamics processing you are applying at
different points in the frequency spectrum.
Using the Side-Chain Input in
Dynamics III
(Compressor/Limiter and Expander/Gate
Only)
Dynamics processors typically use the detected
amplitude of their input signal to trigger gain re-
duction. This split-off signal is known as the
side-chain. The Compressor/Limiter and Ex-
pander/Gate plug-ins feature external key capa-
bilities and filters for the side-chain.
With external key side-chain processing, you
trigger dynamics processing using an external
signal (such as a separate reference track or au-
dio source) instead of the input signal. This ex-
ternal source is known as the key input.
With side-chain filters, you can make dynamics
processing more or less sensitive to certain fre-
quencies. For example, you might configure the
side-chain so that certain lower frequencies on a
drum track trigger dynamics processing.
Side-Chain Section
The Side-Chain section lets you toggle the side-
chain between the internal input signal or an
external key input, listen to the side-chain, and
tailor the equalization of the side-chain signal so
that the triggering of dynamics processing be-
comes frequency-sensitive.
External Key
The External Key toggles external side-chain
processing on or off. When this button is high-
lighted, the plug-in uses the amplitude of a sep-
arate reference track or external audio source to
trigger dynamics processing. When this button
is dark gray, the External Key is disabled and the
plug-in uses the amplitude of the input signal to
trigger dynamics processing.
De-Esser graph display
In Pro Tools TDM 6.9.x and lower, RTAS
plug-ins do not provide external key side-
chain processing. If you want to use side-
chain processing, use the TDM versions of
plug-ins on Pro Tools|HD systems.
Frequency
(x-axis)
Gain
(y-axis)
Frequency
Range
Current gain
reduction
Compressor/Limiter and Expander/Gate Side-Chain
External Key Side-Chain Listen
HF Filter
Enable
LF Filter
Enable