[Icecast] dueling audio

[babu]

Hello,

I joined last week and received great help immediately. I am enjoying 
this informative and genteel list.

Anyway, here's an interesting one:

I am streaming with Icecast using a radio into line-in. It works fine, and 
the stream sounds great. However, I have been doing this for four years, 
and I often would like to listen to audio from the internet without the 
line-in sound in the background. These files do not play in the stream, so 
I don't mind listening to them on top of the line-in audio, but if I could 
block the line-in audio from reaching my headphones, I would be really 
happy.

This is a windows XP box at work, so not my choice in OS. I have assumed 
this is not possible, but I have never asked anyone else about it before.

Thanks,
Tom