The virtual choir of Eric Whitacre

Would it be possible for 3746 singers of 73 different countries perform one masterpiece together? Some years ago the main problem would have been where to arrange te meeting with all those people, but it is not a problem anymore.
The composer and conductor Eric Whitacre has already made this happen three times. He proposes one masterpiece and ask people to record themselves singing it with their web cam. Later, his team remaster all the voices and create a 3D video with all of them.
All the info for the Virtual Choir IV is on Whitacre website.