A neume is the basic element of Western and some Eastern systems of musical notation prior to the invention of five-line staff notation.
"Iubilate deo universa terra" shows psalm verses in unheightened cheironomic neumes.
Cistercian neumes, St. Denis/St. Evrault, North France, 12th century. (Quon)iam prevenisti eum in benedictione and Offertorium. In omnem terram exivit sonus. Variation of the letter F to the left of each line.
"Gaudeamus omnes", from the Graduale Aboense, was scripted using square notation.
Mensural notation is the musical notation system used for polyphonic European vocal music from the late 13th century until the early 17th century. The term "mensural" refers to the notation of precise
Neume
…Some open fonts for neumes are available, which can be used by common office software or scorewriters. Mensural notation Musical notation…
Manuscript choirbook (Capp. Sist. 160, 1510's) in mensural notation, showing the opening of Missa Virgo Parens Christi by J. Barbireau
B. Cordier, "Belle bonne sage"
The Kyrie of Ockeghem's Missa prolationum in the Chigi codex (Chig. C. VIII 234, music09, NB.03)