v1.3 Loss of Sound upon Joining Server

So, when I join a server and sit in the map waiting to spawn, the game hickups for a second and then when it resumes I lose all in-game sound, even when going to the menu. If I quit and try again, same issue. I've tried restarting as well as reinstalling the game. No cake. Any suggestions?

Edit: Mumble still works in-game.