Gianni Di Segni

Arrow 4K Blu-ray > Kino Lorber, see caps https://slow.pics/c/P4E9uTHR

Filmjuwelen Germany 4K has the same problematic master, and some subtitles with errors and slightly out of sync, not-so-good encoding

The 4K Blu-ray 5.0 is the original mix, but more muffled than LaserDisc and even the previous Blu-ray's gentle remix. The Atmos mix is revisionist.

The 50th Anniversary box set has some exclusive extras.

1991 LaserDisc is Dolby Stereo matrix encoded from the original six track master and this was later upgraded to a 5.1 Dolby Digital version prepared for the first DVD. The 5.1 version may have had some slight tweaking in the process. This was reused for the DVD CE boxset and then the 5.1 on Blu-ray seems like a slight upgrade of the DVD track. (The first pressing from the UCE boxset had audio defects rampant on the Blu-ray. These were corrected for standalone pressings.) All 5.1s sound roughly the same as the LaserDisc 2.0 in terms of the mix, but the LaserDisc PCM mastering seems like the only one that is direct without any major processing.