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Dolby A: Difference between revisions
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Dolby A is difficult to distinguish from [[Dolby SR]] by sight. Here are some tips on telling them apart: | Dolby A is difficult to distinguish from [[Dolby SR]] by sight. Here are some tips on telling them apart: | ||
* Many studio films made between 1975 and 1985 will have Dolby A tracks. | * Many studio films made between 1975 and 1985 will have Dolby A tracks. | ||
* Some (but not all) films with Dolby A tracks will display the word "Dolby" - or "Dolby Stereo" rather than "Dolby SR" - with the Dolby logo in the end credits. | * Some (but not all) films with Dolby A tracks will display the word "Dolby" - or "Dolby Stereo" rather than "Dolby SR" - with the Dolby logo in the end credits. But be careful, just because you see one of these in the credits of the film does not guarantee that it is A Type or SR. Some films were released as both mono and stereo prints, or a film may have been re-mastered and released as SR but was originally mono. Looking for the logo is just another clue to be used with other sources of information. | ||
* Some (but not all) films with Dolby A tracks will display the words "Stereo" on the edges of the film [[leader]]. | * Some (but not all) films with Dolby A tracks will display the words "Stereo" on the edges of the film [[leader]]. | ||
* A Dolby A track played in Dolby SR will usually sound harsh or blown out | * A Dolby A track played in Dolby SR will usually sound harsh or blown out | ||
Revision as of 17:18, 10 December 2016
Dolby A is a 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.
Dolby A vs. Dolby SR
Dolby A is difficult to distinguish from Dolby SR by sight. Here are some tips on telling them apart:
- Many studio films made between 1975 and 1985 will have Dolby A tracks.
- Some (but not all) films with Dolby A tracks will display the word "Dolby" - or "Dolby Stereo" rather than "Dolby SR" - with the Dolby logo in the end credits. But be careful, just because you see one of these in the credits of the film does not guarantee that it is A Type or SR. Some films were released as both mono and stereo prints, or a film may have been re-mastered and released as SR but was originally mono. Looking for the logo is just another clue to be used with other sources of information.
- Some (but not all) films with Dolby A tracks will display the words "Stereo" on the edges of the film leader.
- A Dolby A track played in Dolby SR will usually sound harsh or blown out
-
Dolby Stereo logo.
-
Dolby Spectral Recording logo (SR)
