@10Bones01: The name of the piece is "Renaissance Man". It is composed and performed by Stuart Hinds, to be found at his website mentioned in the description of this video.
Videos of singing and other sounds, of the physics of sound, and the perception and theory of music. All about our audio visualization software Overtone Analyzer, to be found at http://www.sygyt.com/
Some people claim that this recording has been digitally altered to make the overtones louder. We should ask Jan about that.
In any case, I have heard Jan sing this live, and he really does sound amazing. I guess it's a mixture of talent and practice.