Polycom SoundStructure C16 Design Manual page 416

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By default the AEC reference has been set to the mono virtual channel "Amplifier" because this audio

includes all the remote audio that need to be echo canceled.

Channels Page Associated with Matrix

On the VTX1000 out channel, change the output gain from -5 to -10 as shown in the following figure. This

change is to ensure the SoundStructure's output signals at 0du do not overdrive the input of the VTX1000

which is expecting a -10dBu nominal signal.

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