The Ancient Greek Musical Notation block spans U+1D200–U+1D24F, 80 codepoints in Plane 1 (Supplementary Multilingual Plane). 70 are assigned in Unicode 16.0; the other 10 are reserved for future characters.
All of its characters belong to the Greek script.
By general category: 67 other symbols (So), 3 non-spacing marks (Mn).
The first 70 arrived in Unicode 4.1 (2005).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.