Originally Posted by tearfalls
Yes. XBOX ONE can upmix your cable box to ATMOS.
Xbox One does NOT upmix anything to Atmos!!! People do not understand how it is works on Xbox One....
It is just setting in Xbox One that sends signal to your soundbar/receiver marked as Dolby Atmos, but the original signal is NOT upmixed. It was set by Xbox this way as in the past there were some compatibility problems on some receivers as those receivers could not detect when audio was in real Atmos and they did not switch to Atmos.
I did plenty of tests with games (5.1, 7.1, Atmos), apps (2.0) and N950 only outputs sound in its original channel output. But this is OK, it is the Xbox One setting which tells N950 to do it this way. So if the game is in 5.1 then you will hear only 5.1 channels (on N950 you will not hear anything from rear speakers, but you will hear it from side speakers, this is the way how it should work) if the game is in 7.1 then you will hear sounds from all speakers except from upward firing ones. If the game is in Atmos then you will hear all 7.1.4.
Setting in Xbox One X for dolby Atmos is for games and apps. If you have checked (I recommend to do this) "let my receiver to decode audio" in Blu-ray setting of xbox settings then all decoding of audio only from Blu-ray app is done by N950 a speakers setup is set by N950 (this way if movie is in 5.1 you WILL hear sounds from rear speakers, so not like in 5.1 games where you are not).
The only way for upmixing on N950 is to use Surround sound mode (only to get virtual feeling of atmos sound, this not of course true Atmos). BUT is not possible to use it if you have set your Xbox to Dolby Atmos. If you set your xbox to any other speaker setup like 5.1 or 7.1 uncompressed or Bitstream dolby digital or DTS then you can use upmixing feature of N950 to output sound as 7.1.4 (of course it is dependent on audio content how the audio is split to channels and how loud it sounds).