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Sound film
Videos
A sound film is a motion picture with synchronized sound, or sound technologically coupled to image, as opposed to a silent film. The first known public exhibition of projected sound films took place
1908 poster advertising Gaumont's sound films. The Chronomégaphone, designed for large halls, employed compressed air to amplify the recorded sound.
1908 poster advertising Gaumont's sound films. The Chronomégaphone, designed for large halls, employed compressed air to amplify the recorded sound.
Image from The Dickson Experimental Sound Film (1894 or 1895), produced by W.K.L. Dickson as a test of the early version of the Edison Kinetophone, co
Image from The Dickson Experimental Sound Film (1894 or 1895), produced by W.K.L. Dickson as a test of the early version of the Edison Kinetophone, combining the Kinetoscope and phonograph.
Eric M. C. Tigerstedt (1887–1925) was one of the pioneers of sound-on-film technology. Tigerstedt in 1915.
Eric M. C. Tigerstedt (1887–1925) was one of the pioneers of sound-on-film technology. Tigerstedt in 1915.
Poster featuring Sarah Bernhardt and giving the names of eighteen other "famous artists" shown in "living visions" at the 1900 Paris Exposition using
Poster featuring Sarah Bernhardt and giving the names of eighteen other "famous artists" shown in "living visions" at the 1900 Paris Exposition using the Gratioulet-Lioret system.
Optical sound
Videos
Optical sound is a means of storing sound recordings on transparent film. Originally developed for military purposes, the technology first saw widespread use in the 1920s as a sound-on-film format for
Edge of a 35-mm film print showing four types of soundtrack. The stereo optical sound strip is located on the right, with waveforms for left and right
Edge of a 35-mm film print showing four types of soundtrack. The stereo optical sound strip is located on the right, with waveforms for left and right channels. To the far left is the SDDS digital track (blue area to the left of the sprocket holes), then the Dolby Digital (grey area between the sprocket holes labeled with the Dolby "Double-D" logo in the middle), and to the right of the analog optical sound is the DTS time code (the dashed line to the far right.)
A transparent program disc imprinted with concentric optical sound tracks, used for the Optigan musical organ
A transparent program disc imprinted with concentric optical sound tracks, used for the Optigan musical organ
Example of a variable-area sound track on the right side of the frames on this strip of 16mm film. The width of the white area is proportional to the
Example of a variable-area sound track on the right side of the frames on this strip of 16mm film. The width of the white area is proportional to the amplitude of the audio signal at each instant.
Newspaper ad for a 1925 presentation of De Forest Phonofilms shorts, touting their technological distinction: no phonograph.
Newspaper ad for a 1925 presentation of De Forest Phonofilms shorts, touting their technological distinction: no phonograph.