Basic knowledge of pitch includes the following aspects:

1. Pitch and note name: Pitch refers to the height of the sound, and note name is the name used to indicate the pitch. . In music, letters are usually used to represent note names, such as A, B, C, D, E, F, G, etc.

2. Musical scale: A musical scale is a set of pitches arranged according to certain rules. The musical scale is usually composed of seven basic tones (C, D, E, F, G, A, B), which are connected through semitone relationships.

3. Semitone and whole tone: A semitone refers to the minimum distance between two adjacent pitches, and a whole tone refers to the distance between two semitones. In music, semitones and whole tones are used very frequently, and they are important elements that constitute chords, melodies, and musical expressions.

4. Vocal range: Vocal range refers to the range from the lowest to the highest pitch that a person's voice or the sound of an instrument can produce. Different musical instruments and people's voices have different range characteristics, which is also one of the important characteristics of music performance.

5. Pitch and musical expression: Changes in pitch can express different emotions and musical expressions. For example, high pitch can express emotions such as excitement and excitement, while low pitch can express emotions such as calmness and sadness. Through the use of tone and musical expression, the theme and emotion of music can be better expressed.

The role of tone:

1. Expressing emotions: Tone can express different emotions, such as happiness, sadness, excitement, etc. High notes are usually used to express emotions such as excitement and excitement, while low notes are more often used to express emotions such as sadness and composure. Through the use of tones, music can stimulate the audience's emotional cries and enhance the appeal of music.

2. Create musical atmosphere: Tone can create different musical atmospheres, such as quiet, tense, enthusiastic, etc. Bass and slow melodies can often create a quiet and mysterious musical atmosphere, while high notes and fast melodies are more often used to express a warm and tense musical atmosphere. The use of tone can affect the mood and state of mind of the listener, making the music more vivid and powerful.

3. Describe musical images: Tone can be used to describe musical images, such as natural sounds, animal sounds, etc. By imitating the sounds of nature, tones can create a specific musical image, making the music more lively and interesting.

4. Expression of music style: Tone is one of the important elements of expression of music style. Different music styles usually have different tonal and melody characteristics. For example, the melody of classical music is usually relatively simple and pure, while the melody of pop music is more complex and diverse. Through the use of tone and melody, music can show different style characteristics, making the music more colorful.