I have an AMD Radeon HD 6800 series. I recently updated the driver to the newest one and since then any time I try to play sound through HDMI it doesn't work. I went to my Sound Settings and tried to test it and it gives me an error "The device is being used by another application. Please close any devices that are playing audio to this device and then try again." I have confirmed via the downloaded tool that I am using the most up to date driver. I am running Windows 7. Any ideas are appreciated.
when you download the latest driver do a custom install and uncheck HDMI AUDIO Driver and AMD Gaming evolved app. If you have already installed the latest driver you can uninstall the entire suite through add and remove option in control panel or you can go to Device Manager and roll back the AMD High Definition Audio Device under "Sound, video and game controllers".