YouTube Symphony Orchestra, the online collaborative orchestra, has opened public voting for participants in its April 2009 summit at Carnegie Hall. Nearly 4,000 video performances of professional and amateur musicians have been submitted to YouTube for membership in the orchestra; a preliminary judging panel—taken from orchestras including those in Berlin, Hong Kong, Sydney, and New York—screened the submissions and narrowed them down to 200. Winners chosen for the orchestra will be announced on March 2; they will travel to New York for a “collaborative summit” on classical music from April 12 to 15, culminating in a concert on April 15, led by Michael Tilson Thomas. Repertoire for the concert will include Tan Dun’s Internet Symphony No. 1 (which the composer has dubbed the “Eroica”). YouTube created the YouTube Symphony Orchestra program with the London Symphony Orchestra, Tilson Thomas, Tan Dun, Carnegie Hall, Lang Lang, and other classical-music institutions and artists from around the world. To vote, visit