Analog way SmartMatriX User Manual page 38

7.2.9 Audio management
7.2.9 Audio management
The audio section permits the management of level, balance, and other audio settings for each input.
Before modifying the audio settings, be sure to check the audio
input mapping. Each video input has one audio source mapped to
it. The audio mapping configuration is found under Menu > Inputs
> each input.
Into the AUDIO SETTINGS:
To display only the Current audio input which is played, click on
Current button.
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If you want to select which audio input will be displayed, click on
the list button then select the input audio source you want.