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The sound I swept out of the string is terrible. Why?

Hello, my friend, I just started to practice sweeping the strings, and there is no good one. According to my experience, I will talk about the skill of sweeping strings:

(1) When sweeping strings, the action of the right hand should be mainly wrist, and the forearm of the right hand is driven by the swing of the wrist. The wrist must be relaxed, but it is difficult to control it to a certain extent. You have to shake hands in front of the mirror again and again to feel it. It is not qualified until your wrist posture is very natural and unrestrained, relaxed and elastic, and well controlled.

(2) The contact angle between the fingerback and the strings is also very important. It should not be a right angle, but an acute angle of about 60 degrees. Figuratively speaking, when the string falls, the index finger nail (or thumb pad) is slightly depressed inward, and when the string is struck, the thumb nail is also slightly depressed inward. The purpose of "letting" is to ensure that the back of the nail, not the tip of the nail, touches the strings.

(3) The trajectory of the fingernail back string sweeping should be arc-shaped, not straight up and down. Draw a circle with your fingers in the direction of the piano head when you lower the chord, and draw a circle with your fingers in the direction of the piano code when you wind it.

④ The depth of contact between fingers and strings also has a great influence on timbre. Touching the strings too deep is easy to lead to sound breaking, while touching the strings too shallow is frivolous and lacks tension.

⑤ Remember that the acoustic effects of chords should be integrated, and the feeling of sweeping strings should be "one by one" rather than "one by one". This requires more thinking and practice.