‘Solfège’ is created (jan 1, 1030 – 3h 50min, oct 31, 2025 y)
Description:
 Guido of Arezzo, an Italian monk, develops a system for learning music by ear. Voice students often use the system, called solfège, to memorise their vocal exercises. In the 19th century, solfège developed into the tonic sol-fa system used today. 
Added to timeline:
Date:
jan 1, 1030
3h 50min, oct 31, 2025 y
 ~ 996 years