1, harmony support. Piano accompaniment can provide harmony support and provide correct pitch and interval reference for vocal music students. Guide the singer into a musical state. Every work of art has a unique artistic conception and a specific background. In order to fully embody the artistic image, the piano accompanist needs to describe the artistic conception of the work in the opening stage to arouse the singer's interest in playing.

2. Rhythm support: The sense of rhythm of the piano can provide a stable beat and rhythm for the singer and help the singer to better master the rhythm and rhythm of music. Emotional rendering: The timbre of the piano can well express the emotions in music. Playing the piano can deepen the emotional expression in music works and add color to the singer's performance.

3. Enrich the music level: As an accompaniment, the piano can echo the singer's voice, form a good sound effect and enrich the music expression level. Stable rhythm: The piano has a strong sense of stability and rhythm, which can better help the singer control the rhythm and speed and make the music more stable and smooth.

4. Enhance the sense of musical structure: the piano has a wide range, which can cover the whole musical work, making the musical structure of the whole work clearer and more coherent. Provide impetus for the development of music: the piano can promote the development of music through the change of rhythm and harmony, making music more dynamic and energetic.

5. Creating musical images: Piano can create different musical images through different timbre, rhythm and harmony, making music more vivid, vivid and interesting. Enhance the expressive force of music: Piano can supplement the singer's voice, enhance the expressive force of music, and make the whole work richer and more appealing.

The relevant knowledge of piano is as follows:

1. The piano is called the king of musical instruments. Complex structure and wide range can be used for solo and accompaniment. There are two kinds of pianos, one is called Hengqin, and the other is called grand piano, which is characterized by loud volume, good touch and beautiful appearance, and is suitable for stage performances. The other is upright piano, which is small in size, easy to carry and suitable for family practice.

This piano has 88 keys. There are also many pianos with 85 keys, 83 keys and 92 keys. The most common 88-key pianos include 52 white keys and 36 black keys. There are fixed standards for the width and length of piano keys, so a pianist can play different types of pianos conveniently.