Now this is a constructive suggestion. I had the same problem few days ago, just cause i switched my home system between PC and TV for a sec, when i came back....sound was off....and then came the real terrific truth....i would had to leave the game to get the sound on again, however, afraid of 1017, i just kept playing without sound (it was not fun i must say).

If possible, the OP suggestion should be implemented in game in the next patches.