You can look at some of the videos from the music machine museum that now has the second marble machine and has been working on making it actually work. Basical

You can look at some of the videos from the music machine museum that now has the second marble machine and has been working on making it actually work. Basically it was 90% done but missing the other 90%. It was far too unreliable to get through one song still let alone a whole show: https://www.youtube.com/watch?v=Yr6NCtYQ9lQ https://www.youtube.com/watch?v=Yr6NCtYQ9lQ I was at the meetup and they let us play it ourselves. It was great, but you could see all the issues it still had even after them spending months with a team of multiple people.