Absolutely make sure to have Stracker's Loader for post Iceborne. This is what most mods will need now to work.

INSTALLATION: For manual installation, extract in the game's main directory which will be usually be located in (unless you put it in a different drive):

C:\Program Files (x86)\Steam\steamapps\common\Monster Hunter World
Extracing will create the folders nativePC\sound\wwise\Windows

UNINSTALL: Delete or move files in nativePC\sound\wwise\Windows

Credits:
Creator of NieR Music Pack (Post Iceborne) for the inspiration