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Gating Settings: Auto Gating
The upper section of the Gate Settings section of the screen contains the gating controls for Auto Gating as shown
below.
Auto Gating: Settings
Gate Ratio• : Specifies how much louder than the ambient level the audio level must be before the channel
automatically gates on. The gate ratio range is from 0 to 50dB. The default is 15dB.
Hold Time• : Determines how long the channel stays gated on after the audio falls below the Gate Ratio
threshold. The hold time range is from .1 to 8.0 seconds. The default is .3 seconds.
Off Attenuation• : Sets the amount of level reduction applied to a channel when it is gated off. The range is
from 0 to 60dB. The default is 12dB.
Decay Rate• : Determines how fast a channel gates off after the Hold Time expires. The default is Medium.
NOTE: Changing Hold Time, Off Attenuation, and Decay Rate also changes the same settings
under Manual Gating.
Auto Gating: Ambient Tracking
Adaptive Ambient• : Adjusts the ambient reference level as noise and room conditions change. When
Adaptive Ambient is on, the mic channel monitors the ambient noise level on the input and adjusts the
ambient level reference automatically. This means that the gate threshold level automatically increases or
decreases based on background noise. The default is On.
Manual• : When Adaptive Ambient is set to Manual, the input will use the fixed ambient level you specify in
the Ambient Level field as its gating reference.
Auto Gating: Processing Functions
Chairman Override• : Provides gating priority for this mic input over any other mic input within the same
gating control (mixer) group. When a mic with Chairman Override enabled gates on, all mics which do not
have Chairman Override enabled will gate off. The default is Off.
PA Adaptive Mode• : Uses the audio level on a specified output as the new ambient level when audio is
present at the power amplifier. This prevents loudspeaker audio from gating on the mic while still allowing
people in the room to gate on microphones when they speak (provided that their voices are louder than
the loudspeaker audio). For example, you might decide to play background music from a CD player during
a presentation. PA Adaptive Mode allows you to use the output routed from the CD player as the ambient
reference to prevent the CD player’s audio from gating on microphones. The default is on.
PA Adapt and AEC Reference• : When PA Adaptive Mode is selected, you must define the output that will
be used as the reference source for PA adaptation and Acoustic Echo Cancellation (AEC). Select a source
in the PA Adapt and AEC Reference drop-down list. You can use any one of the outputs, expansion bus
references, virtual references, or speaker output channels as the reference.
Gate Settings: Manual Gating
The lower section of the Gate Settings section of the screen contains gating configuration controls for Manual
Gating as shown below.
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