The world's largest collection of Beethoven manuscripts and letters has gone digital. The Beethoven House in Bonn, his birthplace, has scanned more than 5,000 handwritten letters and manuscripts and posted many of them for access on its Web site. The project, in cooperation with the Fraunhofer Institute for Media Communication in Munich, cost more than $6 million and includes many documents newly available to the public, said a spokeswoman at the Beethoven House. The Web site, in English and German, also includes audio examples of some of Beethoven's works