
This short was released in connection with the 20th anniversary of Warner Brothers' first exhibition of the Vitaphone sound-on-film process on 6 August 1926. The film highlights Thomas A. Edison and Alexander Graham Bell's efforts that contributed to sound movies and acknowledges the work of Lee De Forest. Brief excerpts from the August 1926 exhibition follow. Clips are then shown from a number of Warner Brothers features, four from the 1920s, the remainder from 1946/47.
Cast

John Barrymore
Don Juan (archive footage)

James Cagney
Tommy Powers (archive footage)

Anna Case
Unknown

Thomas A. Edison
Unknown

Mischa Elman
Unknown

William H. Hays
Unknown

Al Jolson
Unknown

Giovanni Martinelli
Unknown

Edward G. Robinson
Unknown
Roy Smeck
Unknown

Marion Talley
Unknown

Jack L. Warner
Unknown
Efrem Zimbalist Sr.
Violinist

Mary Astor
Adriana (archive footage)
Harold Bauer
Unknown

Truman Bradley
Unknown

Jack Carson
Unknown

Dane Clark
Unknown

John Garfield
Unknown

Paul Henreid
Unknown

Davey Lee
Unknown

John Litel
Unknown

Ida Lupino
Unknown

Dennis Morgan
Unknown

Franklin D. Roosevelt
Unknown

Ann Sheridan
Unknown

Alexis Smith
Unknown

Kent Smith
Unknown

Martha Vickers
Unknown
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