For all you sound fiends out there, it turns out the Xbox One does not support Dolby Digital encoding at launch according to Microsoft director of product planning Albert Penello - and he's not telling when we'll get it.
"Dolby Digital is coming post launch," Penello explains. "This was a [software] scheduling issue pure and simple, and I know people are disappointed, but we will have it."
Anyone with an HDMI receiver should be fine, as we pass the uncompressed 5.1 and 7.1 through HDMI as well as DTS. Even if you have a Dolby only HDMI receiver (which I'm not sure exists), you will still get 5.1 or 7.1 sound since those receivers should accept uncompressed surround.
This may be a problem for anybody using a high end headset that requires Dolby Digital, as Penello explains that - for now, at least - you'll only get stereo audio (since stereo and DTS are passed through the optical port).
Although this may seem all doom and gloom for the moment, Penello is adamant that Dolby support is coming.
Forged haphazardly from discount parts and blinded by the old world ideals of Sega fanboy-ism. Jonny Robot is half man, half machine and runs on the unstable fuel source of lukewarm coffee. He also owns an Atari Jaguar but can't justify why.... a burden he bears to this day.