Jonno said:

Hmmm... I've just checked the three sound mixes on the Blu (DTS, Dolby 4.1 and Dolby 2.0) and not only is the "Kane's son" line present on all of them, the take used for Dallas' "Morning Mother" sounds exactly the same! I even popped in the 20th anniversary DVD for comparison - the two tracks on that release sound no different in those scenes.

Is the '95 laserdisc possibly the only proper preservation of the 70mm mix? Thanks for the reminder of that, by the way. I've never seen/heard that disc but I was aware of its existence. I wonder if that track has ever been extracted (not sure of the ins and outs of AC-3 on laser).

What the...? Do I remember things wrong here, I was pretty damn sure of those two differences, now I really have to investigate this. A friend of mine own that old Laser, so I have listened to this track, but it has been a while since I last heard it so it may be my memory playing tricks with me.

That '95 THX release was the only video release as far as I know that had the 70mm mix.

Jonno said:

And I'm aware that these posts have been wildly off-topic, so perhaps we should discuss this elsewhere! It's just that I saw a 70mm screening about 15 years ago, and its raw and vital quality made quite an impression on me - none of the Blu audio tracks have quite the same effect.

Damn, I'm jealous. I have wanted to get that LD for just that track but when I found out that they were going to include it on the blu-ray... I'll have to ask the buddy of mine about this. Maybe start a separate thread for this or take it through PM? Maybe someone else on this forum own this laser to check?