In addition to the prologue with director D.W. Griffith, two sound sequences on synchronized disc were added for showings in New York City: Ralph Graves singing a love song and a second sequence with crowd noises during a craps game.
In an early experiment with sound, director D.W. Griffith filmed a brief introductory prologue where he was seen (and heard) speaking directly to the audience about the film they were about to see. This introduction still exists, but is missing from most versions of the film.