History of Film — Wikipedia article on the History of Film.
Arabian Gun Twirler — Early film without music.
Tinfoil.com — History of early recorded music.
Silent Films — Wikipedia article (see examples on page).
NPR article — Listen to this article about live music in silent films.
Pola Negri site — Introduction to Modern Music in the Silent Film.
Desperate Desmond — Wax cylinder recording from the Library of Congress of a “rehearsal” for a vaudeville show.
Sound film — Wikipedia article on Sound Film.
The Jazz Singer — Clip from the first “talkie”: Toot Toot Tootsie, performed by actor Al Jolsen.