> We use the Musical Instrument Digital Interface (MIDI) standard to represent a musical piece as a sequence of time-stamped messages corresponding to "note-on"

> We use the Musical Instrument Digital Interface (MIDI) standard to represent a musical piece as a sequence of time-stamped messages corresponding to "note-on" or "note-off" events. A message carries additional pieces of information such as the pitch of a note and its velocity. I play the piano and I think MIDI does not have enough parameters to describe an acoustic piano. It's not just a single strike velocity that determines each sound. Where you play within the double escapement, how far down you hit the key, they all change the sound a bit. That said though there are better MIDI synthesizers, e.g. https://www.modartt.com/ https://www.modartt.com/ They still don't match an acoustic. I can tell the difference quite easily. I think a neural TTS retrained on piano data could do better.