Musical notation

Definition and stakes

US Copyright Office,  Compendium of US Copyright Office Practices… (1984)

“ Standard musical notation, using the five-line, four-space staff is the form most fre­quently employed to embody musical works. Precision equal to that offered by conventional notation is not required, although the deposit should constitute as precise a representation of the work as possible. Any graphic representation of pitch, rhythm, or both, suffices as long as the notation is capable of being performed. Examples: graphically drawn hand signals, fret notation, staves with more or fewer lines than the conventional staff, and "new music," combining graphic art with music notation. ”
Source: Wikisource

Sheet music

“ Reading basic musical notation is not that difficult and once you know what the symbols mean it is usually easy to write out the appropriate code in either LilyPond or ABC.
Each note is made of one to three parts:
The parts of a musical note: note head, stem and flag. The note head is a circular dot, the stem is a vertical line connected to the head at one side and the flag is a short diagonal mark at the opposite end of the stem to the note head. Note head: All notes have a note head, a circular mark like a dot. Notes heads show the pitch of the note.
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Source: Wikisource

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