No Music in Mainmenu anymore

Hello.

As the tittle says, i have no music in the main menu anymore. its just gone from one day to another. i have repaired the game, i played whit sound options ingame..i dont know what to do.

i have reparied the game.  no new drivers... nothing. my pc is the same as before the bug appears

music playes normal in loading screen an mutliplayer/offline. BUT: it dosent loop anymore. even if i turn in option the music to "on" and not too "loop", the music stops randomly in time.

so i need help. what can i do?