The Criterion blu-ray sounds great. It uses what seems like the same audio transfer as the Warner DVD track but with much less noise and rumble reduction. The DVD is abysmal.
The MGM LaserDisc often sounds more natural than the DVD, but it has less detail too. It's difficult to say whether it has underlying source issues or if its high end was removed through primitive noise management. Either way, it does not sound good.
It's strange to read reviews of the blu-ray that say there is no "age-related hiss" on its audio track. Of course, hiss is not an age-related artefact, but there actually is plenty of it on the Criterion -- and it is precisely because the track escaped heavy-handed noise reduction that it manages to sound so good. This can be said of so few discs these days and really should be highlighted:
