Sound motion pictures : from the laboratory to their presentation (1929)

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i4 SOUND MOTION PICTURES Vitaphone, and Photophone. Whether these companies will permit their apparatus to be used in connection with other sound-reproducing devices will depend to a great extent on whether such mechanisms infringe on the Western Electric or General Electric patents. This is a legal question which will be settled in the courts. On August 7, 1928, Mr. David Sarnoff issued the following statement for the R. C. A.-Phonophone: As a convenience to exhibitors and with a view to obtaining complete interchangeability of sound films made by the Movietone and the Photophone processes, R. C. A .Photophone has now adopted a sound track eighty miles in width, but retaining the Photophone method of recording. Tests made in studios and theatres with a variety of sound motion picture subjects prove conclusively that Photophone films not only play interchangeably on movietone projectors, but also give normal and satisfactory speech and musical quality perfectly synchronized. The eighty-mil Photophone sound track requires no modification whatever of the Movietone sound projector; neither is the operating procedure of Movietone changed in any way. I know of no reason, technical or otherwise, why sound films recorded by the Photophone process cannot be satisfactorily played on either Photophone or Movietone machines installed in theatres. Also, the Photophone Company has no objection to sound films recorded by the Movietone process being played on Photophone machines installed in theatres. There appears to be little question that interchangeability, by reason of economic expediency, will automatically become a fact throughout the industry. Had the silent picture originally operated with different types of projection machines running various widths of film, the progress of the entire industry would have been arrested. Sound talking apparatus can be likened to that of the motion