Since the last time he looked at the stars with Wei Gong and Jian Rin Sakura, he said that people cultivating immortals and ascending may have entered another world, Cui Xiaoxiao seemed to suddenly wake up.

Her crossing over from another world is an incredible thing in itself.

Maybe there really is something that plays a very important and magical role between consciousness and reality.

As a scientist, the first thing to do is not to reject a new theory or phenomenon, but to understand it, and then find out the principle, the incorrect theory will naturally be refuted, and the correct truth will be continued.

Just like the many polemics between Einstein and Bohr, the famous founder of quantum theory, Einstein initially believed that there was a certain conflict between quantum physics and relativity, so he could not accept Bohr's theory, and the two men quarreled with each other, but in the end quantum physics stood firm, because Bohr perfectly explained the questions raised by Einstein.

Bohr was also proved right.

In the 23rd century, quantum physics has been widely used in various fields of people's lives, such as quantum computers, quantum radar, quantum astronomical telescopes, and various quantum devices......

In particular, the extensive black hole interference phenomenon allowed Cui Xiaoxiao and them to discover the various uses of God particles, which led to an advanced exploration of parallel universes......

And then here she was.

In this case, if Cui Xiaoxiao wants to understand the world, of course, she has to start with what is enshrined as fundamental by this world-

Cultivating immortals.

Although some of the high-level cheats are not passed on to outsiders, there are cultivation books that have been passed on to the Fundamentals all the way up to the Ninefold Realm.

But when she got the basics, the whole person was completely blindfolded.

This immortal cultivation book is very vague about the explanation of the cultivation method, and the person who wrote the book to teach it at the beginning did not give a reasonable explanation of the basic principles.

For example, the spirit of all things has a spirit, but what exactly it refers to, and how to perceive the existence of spirit, is also very vague.

If it is true and objective, then there must be some instruments and methods to detect it.

But cultivating immortals is not like this, it needs you to understand and feel......

There was no way, Cui Xiaoxiao could only find Wei Gong, who was also a traverser, to see if she could get an answer from him.

Wei Gong was looking at her with a strange gaze, which made Cui Xiaoxiao feel very uncomfortable.

"Don't work in vain, come on, let's make an exchange." Cui Xiaoxiao moved a chair and sat in front of him.

"Swap? What do I need you to exchange? Emiya looked at her suspiciously.

"Aren't you researching the materials for the Wing Piano Sword?"

"How do you know?"

"You can see it at a glance." Cui Xiaoxiao said, "Your vocal films are so obvious, and you have been auditioning here." ”

She pouted, her eyes fluttering back and forth, and said disdainfully, "What can you hear from a person like you who is not perfect?" ”

"Cui Xiaoxiao!"

"Exchange, I ask you a question, you can also ask me one, my ears are very smart."

"Okay." Emiya sighed and found a chair from outside to sit down.

In a way, Cui Xiaoxiao is not wrong, he needs her help, both in hearing and in theory.

"You've already asked one just now, so I'll ask you this time." Emiya said politely, "What if I want the timbre of the two sounders to be exactly the same, or 90% similar, but I don't want to use the same material?" ”

Cui Xiaoxiao shook her head, "There's no way, you know, Heraclitus has a famous saying that it is impossible for a person to step into the same river twice. ”

"Hey, I'm not here to listen to philosophy."

"That's why I said it's impossible to be exactly the same, you can make similar tones with the same material, but there will still be differences, and even more so with different materials, the differences will be even greater."

"Hmm......" Wei Gong frowned, a little difficult to accept what Cui Xiaoxiao said, "So the sounds we hear with headphones and computers, such as piano music, or pop songs or something, aren't they also the same, and the computer can simulate them?" ”

"No, come on, come on, the teacher will explain it to you." Cui Xiaoxiao moved the chair closer in the direction of the palace, "The principle of sound is very simple, we all know that it is vibration, right?" However, even sound waves of the same frequency have different effects of propagation, reflection and diffraction in different materials, and the sound emitted by a musical instrument is not just a simple sine wave, but the repeated superposition of many waves, even a small extra bump on the wood, will lead to different wave superposition effects caused by density changes. Therefore, it may be really difficult to reproduce the classics of the past in a piano that has fallen into disrepair. Therefore, if your material changes, it will inevitably cause a change in one of the waves, even the slightest part of the reflected wave, to affect the timbre they emit. ”

"Hmm......" Emiya looked at her with a puzzled expression, although he understood everything she said, but the man still didn't explain why the computer was able to simulate the sound problem.

Cui Xiaoxiao smiled, especially enjoying Wei Gong's expression now.

This is the same feeling she had when she was a doctoral supervisor when she lectured to her students, and they would all look at her with admiration, which greatly satisfied her self-esteem.

"Ahem, then let me explain to you, what you said before about computer simulation music, this is actually just a surface, because the human ear has a very limited ability to distinguish sound, and if you make a sound at the same time, the human ear can only hear the sound of one of the audios, which is why when creating music, you must first write the main melody, and then write the harmony. Among the various sounds, people are the most sensitive to human voices, and you can recall for yourself whether the songs you listen to only remember the main melody in the end. ”

"Hmm...... That's true, right...... But ......"

"So, the computer's simulation of a sound is very simple, it just remembers the changes in the different frequency bands of the sound and reproduces it exactly. That's why you feel so similar when you hear it. However, when it is reproduced, due to the playback equipment, it is not possible to completely reproduce the original appearance of this sound, and you can understand that the computer uses the frequencies of the original segment to reinterpret it again. However, it is no longer the same voice as it used to be. That's why even if your audio equipment is good, it's better to listen to the scene. Moreover, even if it is the same musician, using the same instrument, in the same place, there will be differences in what is played. ”

Cui Xiaoxiao snapped her fingers, and a satisfied smile appeared on the corner of her mouth, "So this confirms what I said at the beginning - it is impossible for a person to step into the same river twice." ”

"Uh......" Wei Gong's eyes were cold, and Cui Xiaoxiao was so frightened that she quickly shrank back.

"So, I can't make a single sword?" Wei Gong cried with a sad face, only feeling that all thoughts were lost.

……