here's a link to an mp3 of the recordings http://www.nasa.gov/mp3/687631main_68701...orus_1.mp3
I think the idea of our planet singing is quite a beautiful one, even if we don't have the ears to hear it. To me the recordings sound almost like dolphins or the sounds of a jungle.
I think there are some interesting metaphysical implications to this.
perhaps I should have put this in the science forum, if an admin wants to move it be my guest