The directors cut of wrath of khan soundtrack was derived from the 70mm mix, i mean the 5.1 track in english of course.

I think the recent release of the restored theatrical cut is based on the 35mm mix of the film, but i could be wrong.

The Horner music sounds awesome though on the first issue pan and scan laserdisc and somewhat muffled on the newly cooked up DVD mix.

It is possible that the blu ray is sounding superior and because they purposely made the re-issue DVD sound like crap.

I know they did this with star trek remastered on the DVD the 5.1 was a faked mix and did not have the mono track. On the Blu ray not only did they have the correct mono track, but also the original effects as a bonus via seemless branching.

Also the first time the mono tracks have been available since the japan laserdiscs of the original series, the 2004 DVD's had the mono retracked into stereo 2 channel fakery.

The Music was re-recorded for the series so in that essence that is not faked when they did a new 7.1 mix, but the rest of it is faked from the surviving mono broadcast tapes.