davidajackson

How would you expand this to support elements like attack ("velocity of the key-down" in piano speak), grace notes, timing etc. Would each of those be part of this model or another model? How would you model an arbitrary element (pedal, duration, etc...)

Yes. Memorizing syntax is now obsolete. Frameworks are generally somewhat constrained, now they can be auto-generated to be exactly the UI you want. Only caveat would be saving tokens but tokens are cheap. RIP