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
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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