This is absolutely miraculous and beautiful. I enjoy playing this piece of music on my violin, but hearing it played by a rolling ball on some wood is just something else. Most interestingly this is not being played by a living person, it was set up before hand which makes it seem less possible. I know it is a commercial, but please just appreciate the music box type of rendition of Jesu, Joy of Man's Desiring, by Bach.
Also, think of all the math and precision that was put into this! All that hard work to get it exactly right! Music really has so much of this in it! Very creative and well done, forest singers, well done.
