It's happened a couple of times already, first time I recall that the sound doesn't work even after exiting the game.
Thank you for bringing this to our attention. Can you provide more details, such as your config, headset, etc?
Sure, tho the problem did not occur again in the past week.
Windows 7, SP, 64 bit
Intel i7-3770K 3.5Ghz
GeForce GTX 970
Logitech G230 headset and Logitech X530 sound system