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hippiedalek
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Post subject: Dolby Surround Stereo (Newb question) Posted: 21 Mar 2012, 11:43 |
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Joined: 20 Feb 2011, 19:23 Posts: 1033 Location: United Kingdom Has thanked: 30 times Been thanked: 26 times
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Like the title says this is probably a very newbish question but it's something I've not been able to work out. I have several titles which according to lddb feature Dolby Surround, looking at the icon that looks like Dolby Pro Logic (centre, left, right, rear), is this correct? One such title I own is Star Wars: The Empire Strikes Back (1980) [8764-85], yet when I look on the back of the packaging I see the audio listed as Dolby Surround Stereo, and under the Catalog Information it lists the film being presented in stereo. So are these laserdiscs presented in stereo only, or something like Pro Logic which mixes down to stereo when you don't have a decoder?
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disclord
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Post subject: Re: Dolby Surround Stereo (Newb question) Posted: 25 Jun 2012, 21:57 |
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Joined: 22 Jun 2010, 21:12 Posts: 1616 Location: Plattsburg, Missouri. USA Has thanked: 0 time Been thanked: 11 times
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hippiedalek wrote: Like the title says this is probably a very newbish question but it's something I've not been able to work out. I have several titles which according to lddb feature Dolby Surround, looking at the icon that looks like Dolby Pro Logic (centre, left, right, rear), is this correct? One such title I own is Star Wars: The Empire Strikes Back (1980) [8764-85], yet when I look on the back of the packaging I see the audio listed as Dolby Surround Stereo, and under the Catalog Information it lists the film being presented in stereo. So are these laserdiscs presented in stereo only, or something like Pro Logic which mixes down to stereo when you don't have a decoder? Unlike Pro Logic II, Dolby Pro Logic is a decoding system only. The official name for the matrix used to encode films for Pro Logic decoding is the Dolby MP Matrix and they were identified as Dolby Stereo theatrically and Dolby Surround on home video. Often, the generic term Surround Sound or Matrix Surround Encoded was used on LD's - Chase Surround, StereoSurround and UltraStereo are also 100% compatible with Pro Logic. There are a few films that were originally released on LaserDisc with their surround tracks removed - I have no idea why. The Wiz and the first MagVid pressing of Alien had their Dolby Stereo soundtracks played through a Dolby theatrical surround decoder and then only the front channels were used for the LaserDisc. It makes no sense because Dolby Stereo has always been mono and standard stereo compatible. Until AC-3 and DTS came along, stereo/mono compatible matrix encoding systems were the only way to experience surround sound from LD at home.
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