When I have my headset plugged in, I cannot change the audio source
So my headset is a Turtle Beach Ear Force x11. When I plug it in, it is automatically selected for output, which is fine. But if I want to use my monitor's speakers, I have to unlug the headset from the back of my computer.
Here is how my sound preferences look when the headset is not plugged in. http://i.imgur.com/eLlqxGn.png
And here is how it looks when the headset is not plugged in. http://i.imgur.com/q4Pj32F.png
When I try to select HMDI it turns blue as if selected, but the headset is automatically reselected.
Mac mini, OS X Mountain Lion (10.8.3)