W7 Volume error on Left 4 Dead

Hi people. I dont know why but, when I play Left 4 Dead or Garrys Mod the process volume on Volume Mixer goes on minimum but a "ghost" volume icon stays on maximum.

I always have to minimize my game and get my volume on maximum again, each round start (when survivors were overwhelmed or survivors win).

When i have an SS i post here.

It looks like this problem is very common with L4D on Windows 7. To try and fix it, open the Speakers properties then under the communications tab, ensure that it's set to "Do nothing." That should solve your problem

im sorry but i didnt found the "Do Nothing" box, and there is no Communications tab

Did you check under Control Panel > Hardware and Sound > Sound for the speaker properties (sorry I missed that part out). The communications tab should be the last one on the list I'm 99% sure this is the problem, as the default option on this page reduces your speaker volume when it detects communication activity (which some games use).

Thank you! I found the communications tab and then select Do Nothing, but I did the following:

Control Panel > Hardware and Sound > Change system sounds > Communications

I'm gonna test it and then reply here if is the real solution!

Fingers crossed that it works

yes! it worked, thank you, i didnt replyed before because I was playing =D

thankyou so much.

Great news, glad that worked

Can I make a new topic showing how to fix it, but with some images? Thanks.

Sure you can, that would be great!