Jaws
Terminator
Halloween
Psycho
Mad MaxThere’s also been examples such as Grease and Scarface where although the original mixes were not mono they still were given 5.1 remixes later on that completely revised everything.
though fortunately for at least most of these movies the original mono/dolby mix was provided alongside the 5.1 version on their blu ray releases (Terminator being the only exception), though for Grease the original Dolby mix finally resurfaced in 5.1 form on the recent 40th anniversary release
Ah good, I hope the 40th Anniversary Grease has the original “Hopelessly Devoted” without background vocals. I have the laserdisc and VHS with the original Dolby.
I can confirm the 40th anniversary version gets rid of every single issue regarding the previous 5.1 remix made back in 1998. (replaced sound effects, song revisions, etc.)