Well, I’m saying that they are capable of it.
The optical audio stays on all the time. There’s no real reason to use that input with a PC, because the voice chat functions only work with a USB connection and you’re doing to get identical game audio quality either way.
The only thing that the mode switch does is change the behavior of the USB connection. In Xbox Mode, the USB port output emulates an Xbox One controller with a chat headset connected to it. That way, it works natively with an Xbox One console for chat functions.
In PC Mode, the USB output shows up like a traditional external sound card.
In either mode, the optical input just sits there and pumps whatever audio you put into it out to the headset.
If you’re using this with a PC, you’ll want to connect it over USB and set it to PC mode and be done with it. I just thought it would be good to mention that the port was still active, because if you have an active audio source plugged into the optical port, you’re going to hear it no matter what.
At least, that was my experience during the review process. It’s possible that a firmware update has since changed this functionality, but I wouldn’t be able to tell you.
Thanks for reading and for the reply!