CatBus said:

timdiggerm said:

Can I get an explanation of the advantages of using these soundtracks over whatever's on their blurays?

I can't vouch for all of them, but I'd say the goal is to get something that more closely resembles the theatrical audio. The problem is, in many of the above cases, the soundtracks are a relatively small problem on the Blu-ray compared to the video (Back to the Future, Alien/s). But, lacking a correction for the video problems, they're the best we can do.

That's right, the hope is that many of these soundtracks are closer to the original movie's soundtracks with less remixing and changes made. For example, what I'm working on right now, North By Northwest was released in mono durning its original theatrical run which is preserved on the old laserdisc. The DVD and Blu-ray are only a 5.1 remix. So this is a chance to watch the movie with something that is hopefully closer to what they heard in 1959. Same with more modern films, Star Trek II was in Dolby Stereo in the theaters and on laserdisc but on dvd and blu-ray, 5.1. By syncing it you hopefully get the theatrical sound.