Notes

Octave
You need some knowledge about piano notes; even if you’re using MIDI. This is an octave. It has 12 keys and starts from “c”, ends at “b”. In another octave “c” will become “c1”, another octave “c2” and other keys too. Black keys also have names. They have hash in names, black key next to the “c” is named “#c”, next to the “d” is “#d”. It DOESN’T have “#e” and “#b”!

88 keys
Piano has 88 keys. First note is “A-3”. Another is black key - “#A-3”, then “B-3” and “C-2”. The first notes are decreasing and they must have capital letter. After “B-1” there is no “C-0”, it’s “c”. No capital letter until the end, no “-” sign. Just: “c”, “#c”, “d”, “#d”, “e”, “f”, “#f”, “g”, “#g”, “a”, “#a”, “b”, “c1”, and etc. So the last note is “c5”, it can’t be higher. You can also put “mute”, or rarely use - “empty”. They might be used for arpeggios.