Did anyone have a problem with sound while playing the game? From very beginning Unreal has bad digitized sound from which I have a headache :/ I dont know to explain it better in English, Im sorry :/

quit and restart the game
that usually fixes it for me

Go to the system folder in your unreal folder and open the unreal.ini. Under [Galaxy.GalaxyAudioSubsystem] there is an option "UseFilter" write False instead of True. Worked for me. Hope it will work for you too ;-)