poblockw

But in case it is not i have just found something like that: http://climatesoftamriel.skyrim.modunion.com/thecotfiles/ and there is still sound file available to download

It should not be a problem when you disable that file (if you use Mod Organiser)... That way there will be no errors in tes5edit... there is already patch for climate of tamriel and it should cover sounds too... (CoT has been updated to v 5 and it has sound included i think)