My brother showed me this video a few weeks ago. I cannot get it out of my head, as it is honestly the most incredibly complex and talented musical performance I have ever seen.
The background I was given is that this guy is a musician who also happens to be an engineering student, and that he made this machine for his graduate study project (thesis might be the right word? I wouldn’t know for sure, as I never made it to even having an associates degree in college lol).
Anyway, check the video out and I think you will all be also quite impressed with this performance
Also, if you are interested in knowing more, there is a series of other YouTube videos in which he explains how the Wintergatan machine works and how it was built.