Specs say it's an internal digital stereo microphone. Windows does have an option to switch between conference and singleuser mode, like most voice recorders with stereo mics.
Is this Option hardware or software based? What kind of signal does ubuntu receive from the stereomic? Mono or stereo? Is it possible to use this conference/singleuser option? It's a really nice feature and it would be a tragedy if ubuntu wouldnt support it.