A note is a musical symbol used to represent pitch, rhythm and other information in music. Each note has its own name and duration, and can be used to form the melody and rhythm in the score.

In music, the names of notes are usually represented by letters. Commonly used notes include whole notes, half notes, quarter notes, eighth notes, sixteenth notes, etc. The whole note is the longest note and takes up the entire beat. The duration of other notes decreases in sequence, with a half note being half a whole note, a quarter note being half a half note, and so on.

In addition to the name of the note, the note also has its own roll call and singing method. Roll call refers to the phonetic name of each note, usually in English. The singing rules are determined according to the style and region of the music, including special symbols such as legato lines and rests.

Notes are one of the basic elements in music. They represent different pitches and rhythms in music through different names and durations. Knowing the name, duration, and roll call of notes can help us better understand the structure and style of music.

The functions of notes:

1. Expressing emotions: Notes in music can convey different emotions and moods. Through different combinations and timings, the notes can express different emotions such as joy, sadness, anger, fear, etc., making the audience emotionally resonate and moved.

2. Form a melody: The notes are arranged and combined according to certain rules to form a beautiful melody. Melody is the soul of music. It can express the theme and emotion of music, attract the audience's attention and make people can't help but dance to the melody.

3. Express rhythm: The duration and strength of notes can express the rhythm of music. Through different note combinations, different rhythm types can be expressed, such as allegro, adagio, andante, etc., thus presenting different musical styles and emotional atmospheres.

4. Convey music information: Notes can convey the basic information of music, including pitch, timbre, rhythm, intensity, etc. This information is an important basis for understanding and feeling music, helping listeners better understand and analyze the elements and structure of music.