Fortnite game sound just goes-reboot required?

For a few days I have the problem that my gamesound from which nothing goes. Chat is still possible but everything else goes out. It also helps just a reboot did not find anything to re-enable. Has anyone with experience or knows what that could be?

This is probably a bug. There are currently many sound bugs. Many complain, e.g. About that they suddenly hear an extremely loud noise. It happened to me too. Is annoying. You should go to the menu in Fortnite and click on "Feedback". There you describe your bug and then hopefully it will be fixed. Hopefully it will be fixed then. You can't do anything about it except report it to Epic Games.