I am a little confused at your question. Are you trying to record a live output stream? Or is the computer recording one and you would rather it not do that?
What software are you recording with?
What source are you trying to record?
Are you trying to mix different sources?
Is this XP Pro or XP64?
Sorry about the confusion. What I want to know is why still I can record the sound played by WMP without the Stereo Mix enabled. The software I recording with is the Recorder in Accessory
of Windows XP Pro