ClearOne Converge Pro 840T Specifications download pdf (Page 169)

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Use the white cross point area to select the outputs for each virtual reference source you want to define. In the

example above, Output 7 is connected to the room amplifier. This audio includes microphones that cannot be

included in the AEC reference, so Output 7 should not be used directly as the AEC reference source. Instead,

use a Virtual Reference and route any inputs that you want cancelled to that reference. This typically would include

Telco/VoIP 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

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ClearOne Converge Pro 840T Specifications Page 169