Part 1 of Essay
For a very long time music was not written down. It was sung or played from memory. As it was passed on from person to person, many changes crept into the tunes. A way of writing music down was needed so that it would be sung or played exactly as it had been composed. The name for written music that man developed is no ....

Part 2 of Essay
.... horizontal red line, representing the note F, to show how high or low the note should be sung. Then the staff was invented by a monk called Guido d'Arezzo. This was made of four lines. A method of notation that made it possible to show the length of each note was developed in the thirteenth and fourteenth centuries. Notes took new shapes and stems were added to some notes according to their length. By the 1600's the notes had become round and musical notation began to look like it does today. Today music is ....