I'm not sure what exactly you're looking for. If you are looking looking for a compositional tool that will let you write your own scores then Audacity is not what you want. The best tool for this is Rosegarden4. There is an earlier version of Rosegarden on the Knoppix CD but it doesn't come close to what the current version can do (plus it's really ugly!).

You can find the current Rosegarden here: http://www.all-day-breakfast.com/rosegarden/index.html

BTW, aren't you lucky - it was just updated today and looks like some nice improvements have been added. You will need ALSA and JACK in order to run it. I hope the current version somehow makes it onto the CD.