You have probably the Aux outs from your stereo going to the Line In on the
soundcard?
Just go to the system volume control (start, run, sndvol32), choose Options,
Properties, and Recording in the "adjust volume for:" section. When the
window appears, select Line In. Then set the volumes as appropriate
There are two modes for the volume control, recording and playback.
Playback is the default. You can make a shortcut that brings up the volume
control in recording mode using this command: "sndvol32 /r". Note that
in both modes, there are checkboxes for each input type - and note that in
the recording mode, the checkbox is to select, while in playback mode, the
checkbox is to *mute* that input.
If you want to actually record the audio, I suggest you look at Audacity, a
free multitrack recording package.
http://audacity.sourceforge.net/
If the rest of your system is up to the task, Audacity is quite capable of
recording large amounts of audio.
If you want to convert the recordings to MP3 files, you'll probably need to
look for the optional LAME MP3 encoder.
Recording quality depends greatly on the quality of your soundcard. Often,
and in particular for multi-track recording, ordinary soundcards have
limitations that quickly become apparent. Fortunately, you can get really
quite good audio interfaces (a more generic term for soundcards) for what
isn't really a lot of money (particularly compared to the availability of
such devices only a few years ago). I've had great results with M-Audio
products, but there are other manufacturers. Most of these devices come
with recording software.
HTH
-pk