A New Romance of Celluloid: The Miracle of Sound

A New Romance of Celluloid: The Miracle of Sound is a 1940 short documentary film, presented and directed by MGM sound engineer Douglas Shearer and narrated by Frank Whitbeck, which goes behind the scenes to look at how the sound portion of a talking picture is created. The film, which was produced as part of the studio's Romance of Celluloid series, is available as a bonus on the Warner DVD of The Shop Around the Corner. (from: http://en.wikipedia.org/wiki/The_Miracle_of_Sound)