According to Wikipedia, Music of the spheres or Musica universalis is an ancient philosophical concept that regards proportions in the movements of celestial bodies as a form of music.

Considering that my first memory of the telephone was a simple black object with a dial on the bottom and a receiver that hooked onto the body of the phone and music came out of a huge unreliable box called a radio or a phonograph that you wound by hand so that it would play “Rosemarie” or a favorite, “Yes, We Have No Bananas” albeit generally ending in a slow-motion version of itself, I don’t think I have ever been so much in awe of any of the wonderful things that have been developed in my nearly eighty years as I have of Ocarina an app for the iPhone by Smule.

The fact that someone could conceive of an app that transforms the iPhone into an Ocarina that can be played as a sophisticated instrument is amazing enough, but the fact that, at any given point in time you can hear someone or several someones on the other side of the globe playing this marvelous instrument simply blows my mind–truly Musica Universalis, the Music of the Spheres.