According to the needs of playing music, the relationship between strings can also be changed. In traditional pipa music, in order to give full play to the unique effect of a certain music style and make full use of empty strings to get the required chord effect, the method of changing the tuning is often adopted.
Pipa is pronounced with the fingers of the left hand, which is also called virtual sound because of its weak volume. The imaginary sound is the opposite of the real sound played by the left hand. In terms of volume, the real voice is strong and the imaginary voice is weak. If the organic combination of virtual sound and real sound is properly used in some parts of music, it can increase the contrast of music in volume. This combination of reality and reality is the most commonly used method in the traditional Wen Qu of Pipa.