Finally buying one, a few questions

I just have a few questions about the Xbox One and rather the new Xbox One Stereo Headset. My question is how does it get the game audio .. or is it just chat audio?

Second question is : If I wanted to use an older headset would a Optical to RCA (L/R audio) adapter work and has anyone tried this?

From what I understand the Stereo headset should do both game/TV audio and chat.

As far as the Optical/RCA, no clue man.

i use optical to RCA works.

The new headset gets chat audio through the 3.5 mm jack in the adapter in the controller. There are buttons to regulate the chat and game audio.

You can use any standard CTIA 3.5 mm headset though, you don't need the official one. Older headsets work too. You get the chat audio through said adapter (it comes with a 3.5mm > 2.5 mm adapter too). You just set the balance of the audio to chat only.