Additionally, it was not until finally 1030 that an Italian Benedictine monk named Guido d'Arezzo invented a 4-line stave, employing his hand to remember the traces. Many early medieval music is actually a secret. Many people in the period of time were being illiterate, so songs was passed on orally, https://youtu.be/mbqCyyAD1ag?si=xUDvYeIp5tcc6RpP