Musical Instrument Automatization

That's my current project so I've been looking up past works such as this sweet Hupfeld Phonoliszt Violina from the Music Box Society Insternational:

I also found a new instrument by grad students at Virginia which is kinda tight, but not that impressive: http://youtube.com/watch?v=A0iounRCJzk&feature=related

Then I found something that was really sweet, Toyota's new music playing robot: http://youtube.com/watch?v=FcZ2NcCEC0o&feature=related