I'm running the Win7 Beta. Applications keep stealing exclusive audio control. For instance, every time Trillian makes a noise everything else is muted (even if noise levels continue in the mixer).
Similarly, playing a game like Defcon which uses DirectSound stops my media players making any audible noise. This is not true for other games so just seems to be something that some applications do.
I've unticked "Allow applications to take exclusive control of this device" for all sound devices.
I've also set "When Windows detects communications activity" to "Do nothing".
What am I missing?