I'm not sure if this helps but you can get a 4k/bluray/dvd player with 7.1 outputs. Panasonic 820 is around £300 new in uk.
This article is around 8 years old but might be of interest
https://www.bigpicturebigsound.com/How_T..._Why.shtml
Can't help with xbox I'm afraid.
Mark
This article is around 8 years old but might be of interest
https://www.bigpicturebigsound.com/How_T..._Why.shtml
Can't help with xbox I'm afraid.
Mark