My microphone stops working when I close Black Ops 2

[Nightwing]

Hey guys,so,a little problem,after I downloaded plutonium,my mic simply stop working when I close the game,but when I open it again,he works normally,can someone help?

[assassinr3d]

For some reason the mic adjust volume in the game adjusts your windows mic volume. The fix is to go to your windows sound settings and adjust your mic volume in there