The violin has four strings. From high to low, they are E string, A string, D string and G string. The standard notes of these four strings are mi, la, re,sol. One of the strings is the bass 5, and the second string is the alto 2, which is also the basis for tuning. The third string is alto 6, and the fourth string is high 3.

Violins have pitch requirements when they are manufactured and tuned. The pitch of each string must be adjusted before playing, so that a complete and not out-of-tune music can be played. Because the violin has only four strings, except for the four open string notes, the pitch of the other notes in the music needs to be controlled by the player himself.

When practicing, you must pay special attention to the issue of intonation and practice more. When practicing, be sure to listen to the playing tone with your ears. If it is wrong, adjust the position of the fingers of your left hand in time. Not only are the finger positions of the left hand related to the pitch, but also some of the bowing methods and techniques of the right hand.

When the temperature is relatively high, the strings of stringed instruments are prone to loosening, so the strings must be adjusted before each performance. In addition, changes in humidity will also affect the timbre and pitch of the instrument. When the humidity is relatively high, the timbre will be fuller.