Currently migrating a mod from an old (10 yrs-ish) version of TibSun. Most stuff are working, except for some sounds (some working, some not). Sounds work on the older game.exe though.
I have tried the following:
extracting the aud files from the mix and placing them in root and MIX
packing the aud files into a new MIX file
So far some sounds play while others don't.