which dat file stores MP5 gunshot soundeffect，how to decrypt

Hello, Guys！I am currently using Dunia Tools-5-r1 to try to decrypt the .dat files of FC4. My goal is to find the weapon sound effects of FC4 and make some upgrades and modifications.



However, unfortunately, although I have opened the sound.dat file, it is very different from the data exported by extractor2.5.

Dunia Tool exports ".sbao" files, some of which can be played with potplayer, while others cannot be played;

extractor2.5 exports a bunch of .ogm files and a small number of .ogg files, of which only .ogg files can be played.



But whether it is ".sbao" or ".ogg", I still cannot find which one is the weapon sound effect.



Now I have two questions: First, in which dat file are the FC4 weapon sound effects stored?

Second, what is the name and format of the FC4 weapon sound effects?



--------------------update----------------------
some one told me those sound effect stored in fcc_main.dat/mult

but Dunia Tools-5-r1 can not decrypt fcc_main.dat,it will crash before the job is done

My fcc_main.dat(9.19G)   CRC f2fb66f4
fcc_main.fat      (4.71MB) CRC 56aa5a2d