No manual to struggle over, no complicated stuff at all. Simply play and learn. You will learn what it is like to PLAY music of your own. This is very different from listening. You will learn what notes, modes, chords and arpeggios are.
Musicians get to use it too though.
This lets you design individual audio for your links that play, just as the Windows welcome wave does, whenever a person quits a page, starts a new page, or cliks on a wavefile link. If you have Windows95 or above you can play this file. It simply produces streams of MIDI data which are sent to either your soundcard, or a MIDI instrument connected to your computer. Thus mOUSmUSO is limited to MIDI speeds but these are faster than MOST musicians need or can play anyway. So follow the link above and download it.