adjust system volume on WinXP?

[Chipp Walters]

I can adjust the 'application' volume using the playLoudness command. 
But, how can I adjust the overall system volume?

Try this: Start winamp or your favorite mp3 player and load it with a song.

set the volume of the player to it's loudest.
Now go into Rev and type in the msg:
set the playloudness to 10 (volume gets lower)
set the playloudness to 100 (volume gets higher)

so, one would think it does affect globally..not so fast.

now go to the volume control panel and set the slider to almost the 
bottom so that you can barely hear the audio.

No go into Rev and type into the msg:

set the playloudness to 100.
nothing changes, the volume is still very low.

Any ideas anyone?

-Chipp