Simile (abbreviated as sim.) is played in the same way as before, and played in the same way as before.

The treble clef stipulates that starting from the "lower line" of the staff is the middle note C (that is, the standard note 1), and other syllables are defined in sequence. The bass clef stipulates that starting from the "top line" of the staff is the middle note C, and the other syllables are defined in sequence.

The alto clef stipulates that the line in the center of the clef letter "C" is the central sound C, and other syllables are defined in turn. (Usually four lines, if it is three lines it becomes "subbass clef").

The five lines of the staff are not just five lines. It also contains four intervals. From bottom to top, they are the first line, the first room, the second line, the second room...the fourth room, Fifth line*** nine parts. There is a "whole tone" difference between each line and space, for example, 4 is one whole tone higher than 3, treble 1 is one whole tone higher than 7, bass 7 is one whole tone lower than standard tone 1, etc.

Therefore, lines and spaces use position to record the height of notes. Simply counting the bass notes, standard notes and treble notes requires 7*3=21 positions to record, so the above staff cannot represent all syllables. For this we need to expand the number of "five lines".