12 Facts About Dolby Stereo

Dolby Stereo is a sound format made by Dolby Laboratories.

Two, Dolby SVA is by far the more significant, bringing high-quality stereo sound within the reach of virtually every cinema.

Dolby Stereo Labs became involved in movie sound when film studios used Dolby Stereo A type noise reduction on studio magnetic film recordings.

The first film to use Dolby Stereo noise reduction throughout the production process is A Clockwork Orange, though much of the benefit was lost when it was released with a standard "Academy" optical soundtrack.

Dolby Stereo proposed replacing the Academy curve with Dolby Stereo A type noise reduction on the track.

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Dolby Stereo considered the possibility of splitting the soundtrack area three ways to provide a third center channel, but dismissed it because of the negative impact it would have on dynamic range and the problems involved in converting film projectors.

At first, Dolby Stereo equipment was installed mainly in larger theaters already equipped with amplifiers and speakers for CinemaScope 4-track stereo.

Key feature of this system was its backward compatibility: the same print could play anywhere, from an old drive-in theater with mono sound to a Dolby Stereo-equipped cinema, eliminating the need for a costly double inventory of prints for distribution.

The success of Dolby Stereo resulted in the final demise of magnetic stereo on 35mm release prints.

Today, as of 2021; Dolby Stereo still exists, although its market share in the cinema space has quite declined rapidly, with the advent of digital cinema.

Dolby Stereo did not approve of this later practice, which results in loss of separation, but instead used these channels for LFE utilizing the bass units of the otherwise redundant intermediate front speakers.

Ultra Dolby Stereo Labs had introduced a comparable stereo optical sound system, Ultra Dolby Stereo.