Dolby Stereo

(redirected from Dolby Analog)

Dolby Stereo

A digital audio encoding system from Dolby that was first used in movie theaters in the mid-1970s. It recorded four channels of audio and provided a breakthrough re-introduction of the optical soundtrack over magnetic tracks on 35mm film. Many noise reduction and equalization techniques were also used on 70mm magnetic-recorded film. Dolby Stereo was later renamed the Dolby analog format. See Dolby Surround and Dolby Digital.
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Some films have been released in multiple formats and all were put out with a standard Dolby analog track for theaters without digital capability.
Dolby analog and digital developments are incorporated in both professional products that the company itself manufactures, and under license in professional and consumer products from other manufacturers.