So, I finally saw P.T. Anderson's stunning new film There Will Be Blood. Jonny Greenwood, the guitarist for Radiohead, composed the soundtrack. He's received much acclaim, and he deserves almost all of it. One of the most compelling pieces of music in the film, however, wasn't composed by Greenwood, and you wont find on the official soundtrack. It's by an Estonian contemporary classical composer named Arvo Pärt. The piece is called "Fratres;" here's the mp3 (20MB, 11min 30sec) recording by violinist Gidon Kremer and pianist Kieth Jarrett. Enjoy.