As a big fan of the movie, I was disappointed to not see the original 5.1 mix preserved, but instead we were given only a new 7.1 option. While this mix is good, it's definitely very different. Some sound effects have been put in different places (see the raptor paddock scene) and a weird echo added to dialogue in many spots.
Either way, I love the sound of the DTS LaserDisc, and would like to eventually sync it with the Blu-ray image, which was not perfect but better than any other release. Of course, I don't have the sorts of equipment to do such a thing but I would love to at least try and preserve the LD track, but I'm not sure entirely what sort of sound card I'd need to do it. Preferably, I'd like to keep it in the digital domain so there is no sort of quality loss. It is my understanding that the track is encoded on a LD at 1200kbps, disguised as 44.1khz LPCM.
Of course, if I could master this, I'd love to do it for several other titles with exceptionally good DTS LD tracks (Titanic, Apollo 13, GoldenEye).
Let the discussion begin!
I created a forum account because I am embarking on the same project! The Blu-ray DTS track sounded way too weird, especially after seeing JP in 35mm/DTS as a midnight movie over the summer. I haven't played my LD/DTS version of JP in a while, but in comparison to the Blu-ray, it sounded like certain sounds had their volume increased for placement in a 7.1 field -- I downmix 7.1 to 5.1 because I don't have a room large enough for 7.1, so this resulted in sounds that were too loud to be realistic. It's disappointing that the original DTS mix wasn't included.
I've also read that DTS is disguised as PCM, but I'm currently revisiting the standards. I'm not sure if this will be as easy as capturing the PCM stream through SPDIF and then transcoding to DTS, but after reading "The Inconvenient Truth about SPDIF Input!" on avsforum, I'm almost certain that it can't be that easy.
I had also thought about recording each channel, but was also concerned about bit-perfection.
On the film-tech forum, there are threads about projectionists that kept the DTS discs that are supposed to go back with the film, I wonder if theater DTS is decoded the same way as DTS for the consumer market. If it is, then this project can be as easy as finding a Jurassic Park DTS CD-ROM.
Can't wait for updates to this thread! I'll be sure to post my findings when I begin my recording tests.