I have said on other sites http://hydrogen.popez.org/hcms/node/1993 At least for us self-taught : Embed a simple editor with filters similar to Audacity, just a note to the 7 + Main filters similar to those of http://www.audacity.sourceforge.net/ following:
Change pitch
Change time
echo
To produce sounds of Guitar, Bass, Drums, Violin, and each instrument! the only problem is they already have to create a plate of the battery takes 3 or 4 different notes and then it takes the chronology of composition, that if you were to change, for example a tone out of tune ... possibbile believe it! At the moment if I find a keyboard I arranged with Audacity, but the notes are related vibrations and hence is a very complex process ... here is the image of such Filter
Image
I would ask an option with these commands to choose from instead of 3 channel editor :P color video [youtube] http://www.youtube.com/watch?v=Zl5R0Q794zE [/youtube]
I am in such a way I can combine voice and music in audacity if not in LMMS