Here is a way
Drop the .tiger files on to the Gibbed.TombRaider9.Unpack this will unpack them
Drop the unpacked .mul files on to the Tomb_raider_mul This turns them in to .fsb files
Drop the .fsb files on to fmod_extr this will convert them in to .wav audio files
You will end up with 1,000's of files so to speed it up every time you open each file permanently select the program you want to open it with, you can the highlight 15 files at a time and hit enter this works for both the the mul extractor and fmod extractor.
Contains all 3 files needed https://mega.nz/#F!C8JWBYSb Key TR2gA0BQzdXNi3Urz3e9rg