Bootcamp/Parallels - how to use the the line-out on my MacPro I have a 2010 MacPro which I'm multi-booting (OS X, Win 7) using Parallels and Bootcamp depending on what I'm doing.

I can't see how to change the audio setting so that the line-out on the back of the 'Pro can be used as the default output. Do I need a new driver or something? I've tried using Windows Update but it tells me I already have the best available driver ...
I don't have an answer for you for Boot Camp, but for Parallels you should be able to (if you're in Coherence mode): 


Click on the Parallels menu (Just the Devices menu if you're not in Coherence)
Go to the Devices &rarr; Sound &rarr; Input Device menu
Choose Built-in Input device or Line in Input Device depending on what shows up.


Example: