Damn it!

When several judges heard this, they immediately had only one sentence left in their hearts.

What's wrong?

Li Wenyin must listen carefully when giving a live lecture!

So, the judges took out their small notebooks, preparing to listen carefully and take notes by the way.

"Maybe you know that the overtone is the vibration of the entire string, but you don't know the direction of the vibration of the string in the overtone."

Li Wenyin pointed to Title 3 and said to the judges.

"The distance between the wave node of the finger touching the string to the piano code is the vibration direction of the bow moving the bow. For example, from the root of the bow to the tip of the bow, the string of the wave node to the piano code is clockwise!"

"What about the upper half of the strings from the wave node to the pillow? They do fluctuate completely oppositely counterclockwise! It is completely opposite to the bottom!"

"So, this special vibration method and vibration trajectory determine that the overtone is completely different from the tone of the real sound, because the string presents a regular harmonic vibration!!"

These judges quickly remembered their notes!

"The reason why you feel that the natural overtones is natural and you feel that the sound of playing is harmonious only at that point is because this harmonic becomes stable and regular!"

Li Wenyin continued to explain.

"So, artificial overtones are to press the strings with the index finger of the left hand to press the compaction strings, change the length of the string vibration, and change the basic notes, and use the little finger to grasp the virtual contacts of the wave nodes to create an overtone that is different from the natural overtones but is more free!"

"But it is precisely because of this unique double-section vibration trajectory that even the overtones of the hollow string will cause irregular vibrations to a certain extent before starting to vibrate regularly. This is the noise. The right hand arch is to let the strings find its regular vibrations as quickly as possible. Therefore, when the bow is overtones, the slower the bow speed, the louder the noise will be. This is two ways we take when practicing the piano slowly!"

"Oh! Shet! So that's it!"

A judge covered his face, as if he was thinking of something.

Becoming a famous artist, I naturally get used to practicing every detail at the slowest speed.

But Li Wenyin, the artificial overtone, seems to have taken another path?!

Good guy!

The world's piano skills are only fast and cannot be broken?!

"But how to accurately find harmonious phonemes? When I practice artificial overtones, even if I get faster, I often produce very ugly noises, which is completely different from your performance!"

A judge asked humbly.

"Is this related to the piano?"

"Well! It's really related, and it has a little bit of affinity with people."

Li Wenyin nodded.

"When the artificial overtones are played, a phenomenon that is difficult to occur in natural overtones, that is, the partial sound phenomenon of overtones!!"

"Play according to the position marked on the spectrum, but there will be noises or many differential sounds, which will affect the sound quality of the tone. Therefore, it must be manually adjusted to produce clear and bright overtones. The sounds emitted are marked by the spectrum, but the actual operation needs to be adjusted!"

"Hao Lee Shet!!"

The judges exclaimed.

No wonder I always feel weird based on the score!

Just a little bit short!

Before, I always thought that Li Wenyin had written the wrong one!

This kind of harmonic overtone with double-trajectory vibration is a little difficult to distinguish tone from sound.

What's more, artificial overtones do not require careful sound difference.

Because... the distance between the little finger wave node is slightly worse, the sound quality and tone of the entire sound will collapse directly!!

"And, different famous pianos, different pitch heights, height difference of piano pillow codes, etc., will all have such a little impact!"

Li Wenyin explained in detail.

"This phenomenon of partial sound is the biggest obstacle when playing artificial overtones! Therefore, when this artificial overtone is very talented, it is inevitable that failure is inevitable, and success is due to hearing correction!"

"The fingers also have width, so this detail adjustment is a project that a performer needs to study for a long time. Usually, when we play normally, we will subconsciously lower the normal overtones slightly than the normal overtones, but the overtones are not good. The overtones must be pressed to the right position to ensure bright sound quality!"

"why is that?!"

The judges' minds suddenly turned into a mucus.

Confused.

"I understand the error you said by Mr. Li, because from the width of your fingers, pressing on the correct phoneme will be slightly higher, but it will not be different in the overtones. Isn't the overtones also pressed by the thick fingers?!"

A judge asked a question.

"Ah! This is very simple!"

Li Wenyin once again drew two pictures on paper.

Figure 4.

"Look at this picture!"

Li Wenyin explained to the judges.

"Suppose the frequency of the string vibration in the figure is xhz, then the overtone interference point in the figure above is one-third, and the frequency of the virtual sound pressed is 3x/2hz!!"

"We can know that the performance sound after interference is five degrees above the hollow string!"

"Isn't this a natural overtone?!!"

There was a judge who could understand it at a glance.

"That's right! This is a natural overtone!"

Li Wenyin continued.

"But look at the picture below, we press the real note, and when we press one third of the point, the string sound changes. If the tension of the string is t and the string density changed by the tension is p, then this note is (3x/2)x(t/p)!"

"That is to say, you will play a note that is slightly higher than five degrees above the hollow string!"

"This proves that the tone of real and virtual strings is different, so let's briefly summarize it."

"The further away from the overtone position, the higher the overtone position needs to be pressed!"

"So that's how it is!"

The judges got excited.

"What about string plucking? The technique of plucking the string with the left hand can sometimes be not only dull, but also easily scratch the string. How can I improve this?"

"This, you have to be proficient slowly!"

Li Wenyin curled her lips.

"Although it is somewhat similar to the way the guitar is played, the violin is more difficult. After all, the violin does not have the quality on the guitar and will have a great impact on the force. Moreover, it is easy to scratch due to the close string distance, but as for how to play it?"

Several judges pricked up their ears and listened carefully, and even the sound of breathing weakened a lot!!

Li Wenyin shrugged, as if she was a little gloating?

"I can only say... exert force towards the palm, slow~~slow~~practice~~Slo~Slo~Vaq~~"
Chapter completed!