Just a heads up, bioshock has audio problems when running windows 7. (no sound during gameplay)
here's the fix
Enable Stereo mixing, to do this browse to Start > Control Panel > Sound (in classic view). Once done, switch to the Recording tab, which will show the currently active inputs on your system, (e.g. Line in, Microphone), right click in the clear space below these devices and select the option for Show Disabled Devices, This should show an additional device called Stereo mixing, right click on this device and select Enable, also if that doesn't fix it
