sibelius is a common method in music learning, which is used to record the pitch and rhythm of music. The following is a detailed tutorial on sibelius's composition:

1. Note symbols:

- The whole notes are represented by hollow circles.

- hollow ellipses are used to represent binary notes.

- a quarter note is represented by a hollow triangle.

- indicate the eighth note with a hollow vertical line.

- connect a hollow vertical line with a small vertical line to indicate the sixteenth note.

- The positions of notes are on different lines and gaps of the staff, indicating different pitches.

2. Beat mark:

- At the front of the staff, a numerical value is used to indicate the number of beats per bar.

- for example, 4/4 beats, which means that there are four beats in each bar, and each beat is a quarter note.

- for example, 3/4 beats, which means there are three beats in each bar, and each beat is a quarter note.

3. voice division:

- each voice is marked with a pen or pencil of different colors, such as red for the first voice and blue for the second voice.

- voice division helps to distinguish the pitch and rhythm of different instruments or singers.

4. Connecting line:

- When notes cross two bars, they need to be connected by a horizontal line.

- connectors are also used to connect notes with the same pitch.

5. Decorative sound:

- Use trumpet to represent decorative sound, such as triplet, glide, glide, etc.

- Decorative notes are usually written above or below the tonic.

6. Tonality notation:

- Above the first bar of the staff, the tonality of the music is indicated by clef.

- for example, g calls clef in g major and f calls clef in f major.

7. rest:

- a hollow rectangle is used to indicate the rest, which is used to indicate the period of silence.

- the duration of the rest corresponds to the note, for example, the quarter rest indicates the duration of the quarter note.

8. Repetition mark:

- Double vertical lines are used to indicate the repeated parts of the music.

- a number pointing to the repeating section will be marked in front of the repeating mark, and you can return to the repeating section when you encounter the same number again.

The above are the basic points and symbols of sibelius's playing music. I hope it will help you learn music. When learning sibelius's score, we need to practice more, get familiar with the expression methods of various notes and beats gradually, and improve our understanding and playing ability of the score.