If you are trying to unpack the files for modding, ensure you are opening the .dat file through the tool, not the .fat file. Use tools like DecUbiSndGui for better compatibility with audio formats.
If you are looking to extract audio for editing or listening, you can use specialized tools to unpack these archives: Gibbed’s Dunia Tools : Commonly used to unpack DecUbiSndGui If you are trying to unpack the files
: Right-click Far Cry 3 > Properties > Installed Files > Verify integrity of game files . This will automatically detect and download any missing or corrupt audio files. If you are trying to unpack the files