Dolby A: Difference between revisions

'''Dolby A''' is a noise reduction process created by Dolby Laboratories. It is used in many aspects of analog recording but for the purposes of Sprocket School we will be talking exclusively about it's use with 35mm and 70mm film prints. Dolby A can be used to refer to the noise reduction process itself, or to the four channel sound format – left, center, right and surround. It was in use from approximately 1975 to 1986, when it was largely replaced by [[Dolby SR]].