Tancredo Pavone's Six Sixty-Six

Musician John Harmer writes: "I read in Gabriel Josipovici's wonderful novel Infinity: The Story of a Moment about a piece composed by the fictional hero of the book Tancredo Pavone called Six Sixty-Six. I had to play it when I read about it."

Also available via Soundcloud, where you can read the relevant passage from the novel.