The Dawn of Sound: How Movies Learned to Talk (2007)

　　The nearly 30-year struggle to bring sound to motion pictures is the backdrop for this insightful documentary. Film historians, and survivors from the era take the audience from the early failed attempts by scientists ...展开and inventors, to the joined forces of Western Electric and Warner Bros. who, with their Vitaphone process,revolutionized the entertainment industry, perhaps more than any time before or since.