Who invented the system of musical notation that we use today?

Question

Quizplus · Accepted Answer

Guido d'Arezzo is credited with creating the modern system of musical notation in the 11th century. He developed a system where specific notes were placed on a staff with lines and spaces to represent pitch, and the duration of the notes was indicated by the shape of the note heads. This system replaced the previously used neumes which indicated melodic shape but not exact pitch or duration.

Who Invented the System of Musical Notation That We Use