I could use some help

I use a 23" monitor for console gaming (more comfortable for my eyes, easier to pick up details in FPS, better colors than my plasma). It has a DVI & VGA for input. My Xbox one (Xbone) uses HDMI as the output. I have already ordered a HDMI > DVI cable, it will be arriving soon.
My problem is that I use TurtleBeach Headphones for game audio & chat. As it stands, there are no aftermarket headphones for the Xbone. None, from no one. Not until Feb 14th of 2014.
So as you can see, I will have great video on a crystal clear monitor but zero audio from the game. Does anyone know of a way to get the HDMI output on the back of the Xbone to play nice with the Red & White RCA jacks my headphones use? I have not been able to find a single solution in the two hours of looking around, I thought a shot in the dark here would be worth a try.
One option is to purchase a new set of headphones that use optical audio as the input, in which case I could make that work...but then I would only use them for two months and purchase the correct setup for the Xbone. Its a bit of a waste.