Vibrato means that one finger is pressed on the string while the bow is being moved, and the adjacent two fingers fall together elastically on the string, resulting in a special sound effect that appears continuously and alternately.

If we press one finger on the string while moving the bow, the adjacent two fingers will be in a vibrating state, but not vibrating the string, but using the symmetrical inflection of the wrist joint when vibrating the string to be elastic on the string. Falling, a special sound effect that appears continuously and alternately is obtained. This kind of sound effect is called "vibrato".

The vibrato has a longer duration, so it can express a sense of expanse and expanse. However, in the initial practice of the forehead tone, the two alternate tones are often played unevenly, and the tone cannot be played consistently. This is mainly due to the fact that the independent mobility of the fingers is not strong. Therefore, the training of vibrato skills is the most important. It's a good idea to start with shorter vibrato notes.

Vibrato is as rich and diverse as vibrato, including fast vibrato, slow vibrato, never vibrating to vibrating, slow vibrating to fast vibrating, kneading while vibrating, sliding and vibrating, second-degree vibrato, third-degree vibrato, etc. These vibrato can express Different music styles.