You know, punched cards and/or pianola rolls was the first thing I thought of watching you piano video when you mentioned wanting to record it. (my second thought was one of those cylindrical hand wound chimey music box things - https://en.wikipedia.org/wiki/Music_box#/media/File:Music_bo... )
That's a good idea. When I recorded the piano I hadn't built the tetris machine yet so I didn't have the proximity-test library part. Now it would be so easy to test if there is a hole or not (or a bump) in a block working as a sheet as it moves down. And now that scripts have editing powers, I can see how I could add a block to where the "cursor" is when I'm recording the song.
