I made the mistake of installing the EPSON Projector Audio driver. It gets selected all the time, now, even when there is no EPSON Projector around. There's no obvious way to get rid of it. How do I make it go away?
As mentioned in: https://discussions.apple.com/thread/6778963
Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library/Audio. See if the driver is there.
Also check the hard drive level Library/Audio.