Chaz, have a play with the PulseAudio Device Chooser which should be in the Sound & Video menu, if not it's probably hidden (unticked) in Edit menu. If that doesn't help, you may have to play with alsamixer, type alsamixer in a terminal. I suggest you read up on both a little before changing anything.
[Edit] your original post and add [SOLVED] once your question is resolved.
“The people are my God” stressing the factor determining man’s destiny lies within man not in anything outside man, and thereby defining man as the dominator and remoulder of the world.