Mute game when focus lost

[cevk]

It would be extremely nice to have a setting that causes the game to not make any sounds when the game does not have focus. It would be really, truly, extremely nice to be able to have the option to alt-tab and not hear the game. I apologize if there is a setting that does this that I have managed to overlook, but I cannot find it anywhere, nor can I find anything about such a setting when I search.

[Antarnil]

Yes this would be nice, simple muting sounds when opening Escape Menu probably would also be enough.