Sound designer Diego Stocco recorded different sounds made by sand, then turned them into music!
I had some sandbags in the backyard that I used in November during a rainy day. I was moving them to a different spot when I heard the noise of the sand. I thought that maybe I could try a new sound design technique so I bought some piezo film transducers and started to experiment with them.
The entire track is created only out of tuned sand tones. No additional sounds or waveforms. I emphasized the inner notes of the sand grains and mapped them on a sampler as a series of instruments. The grooves are all played live with various techniques, including taping two piezo films to my fingers.
http://www.behance.net/Gallery/Music-from-Sand/171792 -Thanks, Diego!