So, who invented notation? It is! ""Many years ago, it was invented by a monk named Suetti. Suetti's job is to teach believers to sing in the church. At that time, in Europe, where religion was very popular, every Sunday, Christians came to church from all directions, singing songs praising "God". Because there was no music at that time, the monks could only play the heavy organ as accompaniment, teach a song, and the believers learned to sing a song. This method of learning songs is slow and laborious, and it takes a long time to learn a song. Some songs are more complicated, and it is even more difficult to sing correctly and well. ? ! #"!