Annotate a music staff, vertically aligned above or below the music staff at a specific note/time.
notate(x, text, position = "top")
a character string.
This function binds text annotation in LilyPond syntax to a note's
associated info
entry.
Technically, the syntax is a hybrid form, but is later updated safely and
unambiguously to LilyPond syntax with respect to the rest of the note info
substring when it is fed to phrase()
for musical phrase assembly.