Guqin has three main types of timbres: scattered tone (earth sound), overtone (heavenly sound) and pressing tone (human voice). The three timbres are played in different ways and have different expressiveness and characteristics. , like a bronze bell; the overtones are transparent like beads and colorful; the sound is firm and soft like a song, with profound and meticulous expressiveness.

Scattered sound: An empty string sound that is played only with the right hand without pressing the strings with the left hand. Sanyin is characterized by its deepness and depth, which has become the foundation of the vigorous and vigorous qin music. It is as solid as the earth. It has the metaphor of "warriors go to the battlefield", so Sanyin symbolizes the ground.

Overtone: A playing method formed by the combination of left and right fingers. The fingers of the left hand press the emblem, which suppresses the vibration of the whole string, and only retains the vibration mode with the position of the emblem as the node. Guqin can play the melody with a large section of overtones, and the overtones of the Guqin are the foundation of ancient Chinese temperament theory.

Press the sound: Press the string with the left hand, and the sound will be played with the right hand at the same time. According to the characteristics of the sound is gentle and comfortable, round and delicate, like a person expressing his heartfelt affection, there is a metaphor of "the girl's language", so the sound symbolizes a person. The piano has the most tones, and the left fingering is particularly rich and delicate, which can be said to be the most expressive sound of the piano.

Guqin music is intertwined with three tones, changing without directions, and endlessly lingering. The mountains and rivers, the pine winds in the ravines, the light and clouds in the water, the songs of insects and birds, the complex thinking of human feelings and the principles of religious philosophy, can contain and express as much as possible.