Numbered musical notation and so on. Dashes after a note lengthen it, each dash by the length of a quarter note. A dot after the plain or underlined note works increases its length by half, and two dots by three quarters. The underline, along with its joining, are analogous to the number of flags and beaming in standard notation. So are dotted notes. But the analogue stops at notes worth three quarter notes and beyond, where dashes are used instead. The number "0" represents the musical rest. The rules for length is similar to that of the note, except that it is customary
Musical note the classical Latin alphabet (the letter J did not exist until the 16th century), to signify the notes of the two-octave range that was in use at the time and in modern scientific pitch notation are represented as Though it is not known whether this was his devising or common usage at the time, this is nonetheless called "Boethian notation". Although Boethius is the first author known to use this nomenclature in the literature, Ptolemy wrote of the two-octave range five centuries before, calling it the "perfect system" or "complete system" – as opposed to other, smaller-range note systems that