The first movement of Für Elise on my player piano note block machine. Right click the note block to play.
No Mods are required and No Command Blocks are used. 100% Vanilla Creative Mode.

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July 2023 Update: I made it so that the screen sends the lights at the notes being played rather than from them. I fixed one incorrect note that no one seemed to notice (I think there is another dammit) I added a reverb unit to this one. I made the piano nice and tidy looking with classic black finish and cleaned up the wiring.