"String Theory" now has a digital download page at amazon.com that has a sound sample from every tune on the CD...go to this address to hear samples of any or all "String Theory" tracks.
http://www.amazon.com/String-Theory/dp/B004XRWL3A/ref=sr_1_2?ie=UTF8&s=dmusic&qid=1304395060&sr=8-2