ClearOne comm XAP 400 operation manual Virtual Reference window

40 System Configuration ~ Inputs and Outputs

The PA Adapt Reference ✍ and AEC Reference are the same for each channel. If you change the PA Adapt Reference

for a channel, you will also make the same change to that channel’s AEC Reference.

PA Adapt and AEC Reference

When using either the PA Adaptive mode (see page 38) or Acoustic Echo Cancellation (see page 33), the output that carries this information, i.e. the reference output, must be defined. Select the PA Adapt and AEC Reference from the drop-down list. Any one of the eight outputs, four expansion bus references, four virtual references, or Speaker output can be selected.

If you select an expansion bus reference, the Define PA Adapt/AEC Expansion Bus Ref window opens so you can identify which expansion bus output you want to use as the PA reference. You can also open this window from the toolbar.

Figure 3.37. PA Adapt/AEC

window and toolbar button

Figure 3.38.

Virtual Reference

toolbar button

If you select a virtual echo cancellation reference point, the Virtual Reference window will open. This window allows you to select which signals will be used by the four virtual reference points. Virtual references are used when you need to reference multiple outputs. The routing matrix portion of this window can not be edited. You can also open this window from the G-Ware toolbar.

Figure 3.39. Virtual Reference window.

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