Guqin has a low vibration frequency, so many low-frequency noises are difficult to filter out when recording. In the qin music, there are often some blank parts, which are all supported by the hand sound.

However, when some beginners are learning, they do not have a correct understanding of the sound of rubbing the strings, and they blindly imitate the recordings of famous artists, but it will be counterproductive, making the noise overwhelm the music and destroying the expressiveness of the qin music.

Especially because of the unnecessary rubbing of strings caused by bad habits during piano practice, it is more likely to destroy the music.

So how to avoid some unnecessary scratching sound?

1. Make sure that the fingers touching the strings are dry and lubricated. If the hands are not completely dry after washing or there is sweat on the hands, the left-hand walking sounds are prone to "creepy" noises.

2. When pressing the strings with the big finger of the left hand, according to the specification, it is half meat and half armor, but because the meat surface is rougher than the nail surface; in actual performance, it can be slightly biased towards the smoother surface to weaken the meat surface and the piano surface. Noise from friction.

3. The left hand must touch the strings simply. Many piano friends, in order to find the strings conveniently, will touch the strings subconsciously when they play the portamento of a certain string when they are beginners; therefore, there will be a rubbing noise before the music. This is a bad habit that must be corrected in the future.

4. If the nail of the left hand is not trimmed in time, when pressing the string, especially in the middle and lower position, once the tip of the nail touches the previous string, it is prone to rubbing sound. On the one hand, it is necessary to trim and polish the nails of the left hand frequently. On the other hand, when pressing the strings, you can move the held strings slightly back under the condition of ensuring the pitch to avoid "fighting" with the previous string.

5. Finally, it should be emphasized that the unnecessary noise in the left hand is produced when playing the piano. In the final analysis, the basic skills are not solid enough, and the skills are lacking; the arms and wrists are not relaxed enough, and you will only get a blunt rubbing when you try to sing the chime. String sound, no charm at all.