Scenario
Andrew is a theater student at the University of Chicago.
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Andrew has taken some piano lessons as a kid but isn't a master of music theory. He's a big fan of music though, and listens to it a lot. For now he just wants to get the notes down and be able to play around with them. Most likely not much will come of it, since he comes up with little tunes all the time. However, if it went well and he wanted to make it into a full-fledged piece, he'd probably get help from more musically inclined people than himself, like his sister June. As long as he could get her the score, she could work with it in her more advanced software.
Designs
VoiceComposer GR2 - Design 1
VoiceComposer GR2 - Design 2
VoiceComposer GR2 - Design 3