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A newly filed Microsoft patent application will be able to track listeners throughout the room and provide 3D audio regardless of their position. Unlike other sound surround systems, you've got to be sitting at the focal point to get the full effect.

Microsoft's 3D sound system relies on a "depth camera system", to track the user's position within the room and adjusts which speaker produces which sound. Gaming is going to change again. And possibly the future of speakers too.  [USPTO via Wired]