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Virtual Reference and route any inputs that you want cancelled to that reference. This typically would include Telco
RX audio and audio from a video codec (Input 5 above), which in this example are combined to create Virtual
Reference 1 .
NOTE: If the channels selected for a virtual reference use Processing or Faders, you should
select the processing or fader channel as the virtual reference source. This provides the
AEC process with the most accurate reference for the signal, thereby providing faster
convergence and more accurate AEC performance.
Expansion Bus Reference Sources
Use the Expansion References (1-8) section of the screen to use audio from an expansion bus channel as the
AEC/PA Adapt reference source. For each expansion reference, select the Unit and the Output you want to use as
a reference using the drop-down lists.
The following types of sources are available for use as expansion AEC/PA Adapt reference sources:
Output channels•
Speakers•
Virtual references•
PA Virtual References
A PA Virtual Reference assigns audio from a given amp output and applies the same processing to a corresponding
Amp Channel. All processing and audio information is applied to the Amp Channel. (For example, if the feedback
eliminator is enabled on PA channel 2 the feedback eliminator adds a new node. That same feedback node will be
added to the audio contained on PA Virtual Channel 2.)
For more information, refer to the Table of Contents for these related topics:
AEC (Acoustic Echo Cancellation)•
Mic Input Settings•
Processing Settings•
Fader Settings•