Firstly, classification. According to different principles of sound production, violins can be divided into xylophone and electronic violin. The main difference is that the xylophone uses a resonance box to produce sound, while the electronic violin does not. The resonance box of an electronic violin is basically a decoration, which mainly uses a pickup device to pick up and then uses the sound system to transmit sound.

Next is the basic structure and materials. In general, it can be divided into three main parts: the body, string system, and bow. The body of the instrument mainly includes a resonance box, fingerboard, neck, and head. The string system mainly includes strings, horses, hanging plates, and shafts. Generally speaking, a piano body made of spruce (used as a panel material, with a soft texture) and maple (used as a side panel material, with a relatively hard texture) will have the best sound, and then be bonded with curved side panels, back panels, and panels. In addition, maple wood is used to make the neck and head of the qin, and ebony is used to make the fingerboard. Usually metal wire (also nylon wire) is used to make strings, and horsetail hair is used to make bows. The violin has four strings. The difference between each empty string is a pure fifth interval. Due to the fact that the sound quality is directly determined by the structural materials of the violin, the production process of high-quality violins is very strict.