Sound devices disappeared
I plugged in some headphones that had a microphone built into it. It made my sound preferences go wonky. My Built-In Output has disappeared on the list of devices. For a time, I had to manually control the use of headphones as an "Output" and switch back to "Input". Now I absolutely cannot get any sound. Help?!?
MacBook Pro (13-inch Late 2011), Mac OS X (10.7.5)