Theremin

Have you ever seen a theremin?

http://en.wikipedia.org/wiki/Theremin

It is an electronic musical instrument

I think that orchestra is the theremin of the conductor :)...

Orchestra sounds at the gestures of the conductor, similar to the way theremin player changes the pitch and volume of the sound by hand movements in the electro-magnetic field produced between the two antennas of the theremin..


Ethereal music

http://www.youtube.com/watch?v=w5qf9O6c20o