Apple TV to Auralic Femto - no Channel 7 audio via airplay.

[Steever]

I stream all my TV viewing and airplay audio from my Apple TV to my Auralic Aries Femto streamer. 
Every single channel; 7bravo, 7mate, 7two, 9, 10, SBS, ABC, YouTube, Stan, Netflix, Disney, etc, etc gives me audio through my streamer. 
 

7 on the other hand, gives me no audio. 
 

Would anyone know why this is happening?

thanks. 
 

[Steever]

Changing audio settings on the ATV from "auto" to "stereo" fixed the issue.

Thank goodness for that as I thought I was going mad!