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Although few cameras were made that could record the sound directly onto the film (Fairchild Cinephonic Eight cameras, Fairchild Professional 900 cameras, and Pictorial cameras), there were many projectors that could record and replay sound on a magnetic stripe. [8] For cameras, this stripe had to be added to the film before it had been exposed.
The sound was recorded 18 frames in advance of the picture (as opposed to 56 frames for standard 8mm). This short distance of just 3 inches facilitated the relatively compact size of the later sound cartridges. Some projectors used the balance stripe to provide a second channel for stereo sound. Super 8mm was also specified with an optical ...
Projectors also appeared on the market which took advantage of the balance stripe next to the perforations by recording and replaying stereo sound. Projectors appeared in the late 1970s that featured the ability to play films with an optical soundtrack. The image-sound separation for the optical format was 22 frames.
Sound-on-film is a class of sound film processes where the sound accompanying a picture is recorded on photographic film, usually, but not always, the same strip of film carrying the picture. Sound-on-film processes can either record an analog sound track or digital sound track, and may record the signal either optically or magnetically .
This is a list of early pre-recorded sound and part or full talking feature films made in the United States and Europe during the transition from silent film to sound, between 1926 and 1929. [1] During this time a variety of recording systems were used, including sound on film formats such as Movietone and RCA Photophone , as well as sound on ...
35 mm movie projector in operation Bill Hammack explains how a film projector works. A movie projector (or film projector) is an opto-mechanical device for displaying motion picture film by projecting it onto a screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras.