first, you need to go into data.pak, find the folder \Sounds\_(Sound)\Creatures - then there are folders with the names of the factions, in them are folders with the sounds of the units

files in xdb format contain sound settings and the NAMES OF THE FILES YOU NEED WITH THE SOUND

for example, in the folder \Sounds\_(Sound)\Creatures\Haven\Peasant there is a file happy.xdb, and in it is written
8E412366-DB9F-4586-8635-32B090865984
this means that the sound file in sound.pak is called 8E412366-DB9F-4586-8635-32B090865984, if you write .wav at the end of it, it will become a simple sound file.