DigiDesign DigiRack, Manual

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Chapter 6: DigiRack Real-Time TDM and RTAS Plug-ins 77
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 grey, the External Key is disabled and the
plug-in uses the amplitude of the input signal to
trigger dynamics processing.
Side-Chain Listen
When enabled, this control lets you listen to the
internal or external side-chain input by itself, as
well as monitor its levels with the Output meter.
This is especially useful for fine-tuning the plug-
in’s filter settings or external key input.
HF and LF Filter Enable Buttons
The HF Filter Enable and LF Filter Enable but-
tons toggle the corresponding filter in or out of
the side-chain. When this button is highlighted,
the filter is applied to the side-chain signal.
When this button is dark grey, the filter is by-
passed and available for activation.
High-Frequency (HF) Filter Type
The HF filter section lets you filter higher fre-
quencies out of the side-chain signal so that
only certain bands of high frequencies or lower
frequencies pass through to trigger dynamics
processing. The HF side-chain filter is switchable
between Band-Pass and Low-Pass filters.
Compressor/Limiter and Expander/Gate Side-Chain
External Key Side-Chain Listen
HF Filter
Enable
LF Filter
Enable
Side-Chain Listen is not saved with other
plug-in settings.
HF and LF Filter Side-Chain
HF Filter
Enable
HF
Frequency
Control
Low-
Pass
HF
Band-
Pass
LF Filter
Enable
LF
Frequency
High-
Pass
LF
Band-
Pass