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ldfan
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Post subject: Re: Dolby Stereo on Laserdiscs Posted: 20 Oct 2019, 00:04 |
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Joined: 28 Jun 2014, 05:59 Posts: 1459 Location: San Francisco, CA USA Has thanked: 425 times Been thanked: 533 times
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Based on this link..... https://www.dolby.com/us/en/about/history.html.... Dolby Surround was introduced for the home by 1982 but I know for a fact that 1987 was the first introduction of Dolby Pro-Logic for the home. I started collecting LD's in '87 and very vividly recall seeing a lot mainstream releases sporting the Dolby Surround logo on their jackets. If they did not and just noted "stereo" on the jacket, I would usually still play the disc back w/ Dolby Pro-Logic and it would still produce some incredible surround sound (the Japanese anime Baoh was one such title I recall that had some excellent surround effects). Anyway, not sure if the intent of some software manufacturers was to save money on licensing by not stating Dolby compatibility but I would not be surprised. It wasn't tough back then to matrix encode just about anything to work w/ a Dolby Surround processor since it was a simple math concept (e.g.: L+R = Center and L-R = Surround). As for hardware, I don't think many manufacturers tried to skirt the usage of the Dolby Surround circuit on their eq since that was really the buying point for many consumers that wanted surround sound. I would probably not have bought an AV Receiver w/o Dolby since I might feel I wasn't getting something that did meet a certain minimum standard (although I think high end manufacturers like Lexicon had their own proprietary surround decoding scheme that ignored using anything Dolby and I believe they actually sounded better).
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ldfan
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Post subject: Re: Dolby Stereo on Laserdiscs Posted: 12 Nov 2019, 07:09 |
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Joined: 28 Jun 2014, 05:59 Posts: 1459 Location: San Francisco, CA USA Has thanked: 425 times Been thanked: 533 times
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signofzeta wrote: Furthermore there’s no easy way to remove the surround aspect from a film’s soundtrack... That is very true. However, I think just about anything that is in stereo will produce a surround effect of some sort whether it was intended or not just because that's how matrix encoding works. Dolby and other matrix decoders will just keep looking for the "differences" and decide what should be pushed to the rear channel. A good example of this would just be any kind of music one plays back and listening for what happens if a Dolby Pro-Logic processor is left on. Sometimes it might sound really awesome like it was mixed for surround or other times it will sound very gimmicky (like some constant reverb). And speaking of surround for movies, I have found some pretty big differences between older and newer matrix mixes. The first edition of "Macross: Do You Believe in Love" is only noted as "stereo" on the disc jacket and when played back on Dolby Pro Logic sounds quite underwhelming. However, when the Perfect Edition was released with a very purposefully mixed track for Dolby Surround, it was amazing. At times, I thought it had a surround track that was very comparable to a Dolby Digital discrete mix. So I guess what I'm saying is that a lot of great mixes can still be had w/ plain old matrix encoding. However, a lot of effort needs to be made by the sound designer to take advantage of the encoding process to the get the right combination of surround and minimal channel bleed (definitely don't want sounds meant for the front to come out of the rear).
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