When jinghu luthiers play the qin, they often put a cloth under the qin barrel. Many people think that this is just for the sake of cleaning and to prevent the rosin powder from staining the clothes, so the choice of the cloth is very arbitrary.

In fact, in addition to the above uses, there are more important functions. That is: to stabilize the huqin and improve the sound quality. Many Jinghu lovers must have this feeling, especially when playing the piano in summer, the barrel often moves back and forth with the push and pull of the bow, thus causing the huqin to shake. It not only affects the performance of the luthier's skills, but also affects the sound quality. The reason is that the muscles of the human legs are relatively loose, so the huqin cannot be effectively fixed. The tight contact between the huqin's bobbin and the leg muscles will also affect the sound quality.

The main points of choosing a padding are: first, the pad must have a certain hardness (such as canvas), and it can be folded so that the pad is close to the leg cloth, the pad is harder, and the huqin has a crisp pronunciation; Thickness to avoid shaking after the impact force of the huqin reaches the muscles. Third, its area can be about one square foot.

The above are the methods used by professional luthiers to accompany for a long time behind the stage. It is another matter to play for a short time on stage, because it is troublesome and unsightly to bring a large dowel to the stage.