How do the guitar strings from sound and music? I guess many people know. But how many people have seen the way of a guitar strings oscillate?? Here is an interesting one. A guitarist put an iPhone4 into his guitar chamber, fully utilizes the the disadvantage of his iPhone - " the rolling shutter", and convey it to an advantage tool in order to capture the movement of the oscillating strings. By watching this video you will have an idea that how they move. I think it's as interesting as Cymatics.
source: http://www.dpreview.com/news/1107/11071505iphonerollingshutter.asp