Next, Zhao Xingsheng told Gu Xiaobai about the Twelve Equal Temperament. Each octave is divided into 12 equal parts according to the equal ratio, forming thirteen tones, and the frequency of each tone is

, are all times the 12th root of 2 of the previous sound. This is an irrational number, approximately equal to 1.0594630943593.

As a science student, it is almost instinctive to want to understand mathematical problems. Gu Xiaobai figured it out very easily.

Everyone likes to be a teacher, especially Zhao Xingsheng, otherwise he would not be a professor; and teaching a smart student gives people a sense of accomplishment that is unparalleled.

One person talked and the other listened. In less than half an hour, Zhao Xingsheng had already explained the basic music theory to Gu Xiaobai.

Just when Zhao Xingsheng was still interested in giving Gu Xiaobai a history lesson, the law of profit and loss in three points, and the law of mutual generation of fifths, Xiao Su, a graduate student over there, came over and said, "Teacher, what's wrong with t2-f1-3?"

Du' dating has come out!"

"What era?"

"2,700 years ago, early Spring and Autumn Period!"

"Sure enough, this is indeed a relic from the early Spring and Autumn Period!" Zhao Xingsheng's eyes lit up.

They have already made a preliminary dating based on other methods, and thermoluminescence dating of the unearthed pottery is very accurate and can be used as supporting evidence.

Gu Xiaobai also came close to the pottery and asked doubtfully: "What is this?"

"This is called Wudu, and it is an early ocarina-like instrument."

Zhao Xingsheng looked at Wudu, his eyes shining brightly.

He has a deep love for this instrument from the bottom of his heart.

"There are not many Wudu that are so well preserved. I really don't know how the ancients preserved them. The ruins unearthed this time are really a treasure..." Zhao Xingsheng shook his head as he looked at it.

He really wants to blow! Just blow!

Finally, he couldn't help it anymore, waved his hand and said: "Xiao Su, go and prepare the instrument, let's measure the pitch."

Measuring the pitch of unearthed ancient musical instruments is an important part of the study of ancient musical instruments and ancient music. If we don’t know what rhythm the ancients used, what instruments they used, and what kind of music they played, how can we know what kind of music the ancients listened to?

?But many of the unearthed musical instruments have been damaged and cannot be played. It is rare to find one that is so intact.

Gu Xiaobai looked at him, and Zhao Xingsheng sighed: "Sound is probably the last kind of information that humans can record. In ancient times, humans could paint in caves, and countless artists have painted countless famous paintings.

; Throughout the ages, countless writers have written immortal classics. But before humans invented the phonograph, no sound could be recorded, no."

"Those glorious movements and songs sung in ancient times have eventually been lost and decayed in the long river of history. We, the descendants, can only rely on imagination and speculation to know what they were singing, listening to, and playing.

What are you wearing..."

Zhao Xingsheng looked out the window and said: "If those musicians in ancient times had spirits, they must be full of resentment. And they must be looking at me somewhere now, hoping that I can revive their voices and revive them.

In this world..."

Listening to his words, Gu Xiaobai couldn't help but insert himself into it.

If it were me who finally made an achievement in physics, but died before he could publish it, I would probably jump to death.

It must be terrible to gather the resentment of so many musicians...

Zhao Xingsheng sighed deeply, carefully brought the ocarina-like sound to his mouth, and tried the sound.

"Woo..." a sound.

The sound that traveled through 2,700 years sounded in the laboratory.

Gu Xiaobai subconsciously shouted: "F4, no, it's a little lower than f4... 345hz!"

"Huh?" Zhao Xingsheng was stunned, "Xiaobai, do you have absolute pitch?"

However, even with absolute pitch, it is impossible to hear it so accurately, right? How many Hertz can it be heard?

Stop joking, okay?

A person who doesn't even understand music theory actually has absolute pitch?

Zhao Xingsheng glared at Gu Xiaobai, turned around and urged Xiao Su: "Xiao Su, Xiao Su, come here quickly!"

Over there, Xiao Su brought the equipment and looked at the teacher and Gu Xiaobai in confusion: "Teacher, what are you playing?"

After hearing Zhao Xingsheng's explanation, Xiao Su looked unconvinced: "Teacher, I think you are almost becoming a fan of Xiaobai. How is such a mysterious thing possible?"

Xiao Su didn't really believe that his teacher was so good at playing.

How old is Xiaobai? It’s amazing to be able to sing a high tone of C6, a tenor of C6, what is the concept of that!

Now he has such strong hearing?

People who study ancient musical instruments and ancient music must understand music. It seems that Gu Xiaobai doesn't even understand basic music theory, how can he be so awesome?

My teacher must have started having convulsions again.

Forget it, the teacher has the final say here anyway, so Xiao Su can only do what is good.

"Test this sound first." Zhao Xingsheng blew again, then stretched his head over: "How much?"

"The peak pitch is at..." Xiao Su said.

If Zhao Xingsheng hadn't grasped it firmly with both hands, he might have dropped the Wudu in his hand as soon as he let go.

"Then if you listen to this again, woo~"

"388." Gu Xiaobai.

Xiao Su lowered his head and read: "..."

His heart was roaring.

No, is it really so cool that you can even hear the frequency?

Xiao Su felt like she was being shown off.

"Woo~" Zhao Xingsheng played the third note again.

"427.5... This should be an ocarina in the key of F? All the notes are lower than the current standard..." Gu Xiaobai said.

Even with one decimal place? Is there such a cool operation?

Xiao Su glanced down and said: "The fundamental frequency..."

Damn it, just add a decimal point, and the error can be controlled within 0.05 every time?

What kind of ears are these! Are they made of krypton gold?

After all the sounds were played, Xiao Su was really convinced.

"Teacher, I don't think we need to bring any instruments in the future, just bring Xiaobai!" Xiao Su said.

Gu Xiaobai stretched out a finger and scratched his cheek sheepishly.

The "absolute pitch" skill produced by this system is really awesome.

"Genius, this is genius!" Zhao Xingsheng sighed, looking at Gu Xiaobai's eyes, he became even more enthusiastic.

Entered fan mode again.

This is a piece of real gold and jade, and I, Zhao Xingsheng, have actually seen it. Will I, Zhao Xingsheng, become the godfather of music one day?

"Xiao Su, go back and get my book."

Xiao Su turned around and ran away. After a while, Zhao Xingsheng sent a book to Gu Xiaobai.

"Xiaobai, I'll give you this."

"Understanding Music Theory: Synchronized Sight-Singing and Ear Training".

"Uh..." Gu Xiaobai scratched his cheek, "I don't want to be a musician, I just want to be a physicist."

Zhao Xingsheng showed an "I understand" expression: "Just study acoustics and vibration, just take the time to look through it."

"Oh..." Gu Xiaobai accepted it.
Chapter completed!