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Apple TV 4K downmixing AAC 5.1 to Stereo


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Hi Emby Community,


New to Emby - finally abandoned Plex after weeks of frustration. Running Emby server on an iMac 5K 2017 with Mojave 10.14.2, and trying to play media using the Apple TV 4K (latest OS and Emby app installed). For some television shows, Emby is identifying the episode's audio track as being: AAC 5.1 - but during playback via Apple TV, audio appears to be coming in as Stereo.


Have tested other television series and movies, and those appear to be coming through fine in either 5.1 or even 7.1 in some instances. Is there a setting to stop audio being downmixed and force the native track to be sent through?

The video files were all rendered by me using Handbrake and the same settings during the rendering, so I cannot figure out why select files would be downmixed to stereo versus others.


Appreciate any insights or advice!


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