Live audio playback

I've been trying for ages, to no avail, to get my pc to play sounds while I stream things IE I play a movie on something and stream the video and audio. Instead it always attempts to record my microphone and, oddly, I have no stereo mix. The only thing that appear on, for example, audacity when I try and change the recording device are my microphone and "Microsoft sound mapper"
Incase it helps to know I don't have a sound card.

Forgot to mention that I would like help on how to stream audio :p

>>2
VLC player, network stream?

The Mbt with different variety color and designs, Mbt shoes give you a better posture and a more effective gait, The Mbt sale Now! Free Shipping! NO Tax! http://www.mbt-antishoes.net