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Join Date: May 2004
Location: Bull Mountain, OR
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To echo Joe, even if your tv is capable of immersive audio from the internal apps, quite often it can't pass that audio from an external source. In cases like that, ARC is no better than optical because it will be limited to 5.1, in not just 2.0.
Your best bet would be to not use your tv as the hub but to run all external sources thru an avr and just send the video to the tv. That way, your audio can be decoded properly. For the internal apps, you can try ARC to see if that will work but you won't be able to get HD Audio (DTS-MA, Dolby TrueHD, etc) and probably Atmos. Some tv's can pass lossy Atmos from the internal apps via ARC so all you can do is try. Optical from the tv will give you just 5.1, the same as ARC.
I never trust an atom, they make up everything.