extract unpack asset file (form unreal engine 4 pak) with extenstion .uexp which contain awb/acb (cri/cpk like) sound or music resource. i just check it work well with one music game(idms_ss) use ue4.24 and one rpg game(p*l7) use ue4.25. you can just read src and translate into quickbms script.
just put script into your uexp file folder, then run
python uexp2awb.pyit will auto transform all the file under current folder, ex: file.uexp to file.uexp.awb.