Link: http://www.spawnfirst.com/news/dolby-5-1-support-xbox-one-optical-port/
No Dolby 5.1 Support On Xbox One Optical Port
It has been revealed that there is no Dolby 5.1 Surround Sound support on the Xbox One’s optical out port. There is a “Surround Sound (BETA)” option, however, but Dolby 5.1 Surround Sound is downgraded to stereo through the optical port. Users who have surround sound headsets might want to be wary of this issue.
Or take my peculiar AV setup: I like to play games and watch movies with an Astro surround-sound headset, which decodes Dolby 5.1 audio from an optical input cable. However, the Xbox One is currently only able to output stereo and DTS Digital through its optical output. My headphone receiver can’t read DTS Digital, so I have to output in stereo, and my surround headphones turn into regular old headphones.
The issue is also prevalent when using your cable box with your Xbox One. The audio that comes out from using the console is downgraded to stereo format. Microsoft has stated that a non-beta option for surround sound audio output will be available soon, but not at launch. Surround sound is rather important to many people, especially to gamers who want to fully immerse themselves in their gaming experience. A lack of proper Dolby 5.1 will make that somewhat difficult. For those who aren’t affected by this can continue to enjoy their games and movies as is.
(Source: Kotaku)
