I'm sure this is extremely basic, but I love listening to music games at the same time. However, when a L4D2 game starts, the volume drops hugely. Any way to sort this out? I'm sure it's a very basic setting, can't work out what it is though.
Have I got this right, your music volume from an external app drops when you start the game?
If you are on Windows 7 (and maybe Vista) read on, otherwise I dunno. W7 has a feature to drop the volume of all other apps when you receive a voip call, it might be deciding L4D voip is a voip call. As the volume drops when you start a game and not before this is the only thing I can think of.
Go to Control Panel, Hardware and Sound, manage audio devices, communications tab and tick "Do nothing".