Jonno said:
Great additional info! Let's see if we can summarise then:
...
1995 THX laserdisc - 5.1 AC-3 and 2.0 PCM (based on 6-track 70mm master)
Although the AC3 is stated as being from the 70mm 6-track, I'm wondering if the PCM on this LD could be based on the 35mm Dolby Stereo mix? That would be interesting.