I like this! It's sort of like the piano rolls you see in DAW sequencers.

I've made a toy page for it - https://naivesound.com/klavar/ Click on the columns to put a note, add more height if needed, edit the title, then print it to PDF. I often use it to write down simple melodies when playing the piano. Also, there are two blank PDF templates - https://github.com/naivesound/naivesound.github.io/tree/mast...