Conan: The Mechanic

"But apart from these children, there is another problem..." With that said, Qiu Ting Lianzi turned her head and looked in the direction of Mao Lilan.

"Hey, I...Did I play it wrong?" Mao Lilan was taken aback. "No... no?"

"Don't worry, you're playing right, the problem lies with this piano." Qiu Ting Lianzi shook his head. "You can just play a la and come out and have a look."

"Um..." Maurilan tentatively nodded.

"Well, this piano has obviously not been maintained for a long time." Qiu Ting Lianzi nodded. "Although it can barely be maintained near the original range without causing discomfort to the audience, it is obviously not properly maintained, and some of the pitch is falling."

"Really?" Mao Lilan looked at the piano in surprise. "I... well, maybe I'm really not very good at the piano, I can't hear it at all."

"You..." Qiu Ting Lianzi suggested after thinking for a while. "You click to upgrade to see."

When Maurilan moved her finger to the right and pressed the black key to the right of la, she immediately showed a somewhat subtle expression, and Haibara Ai and Ayumi also showed similar subtle expressions. "Really, it seems to be a little lower, and it doesn't seem to have opened the gap with the la key? Well... Generally speaking, I think the problem of la is at least not obvious, but this raise la is better than what I have heard before. la to be low."

And Qianyu is well aware of the error of the piano. At this time, he is just a little surprised that the error of this sound is so large: the frequency of the la sound just now is 439Hz, and the la is generally adjusted to between 440Hz-445Hz , is still in a relatively tolerable range. In contrast, this upgrade has more problems. The standard frequency should be 475Hz-480Hz, but the frequency of this liter is only 460Hz. In other words, under normal circumstances, the frequency of rising la should be 35 Hz higher than that of la, but now it is only 21 Hz higher, so that the comparison between adjacent key positions makes it obvious that even those who have not experienced professional training can feel the rising la. Not high enough.

"After adjusting with the twelve equal laws, has it fallen into disrepair?" Haibara Ai hesitated to put forward his own opinion. "If I remember correctly, the do, re, so, and la keys would be unusually deep when tuned in equal temperament. Combined with the overall tonal dip caused by poor maintenance, this makes These sounds are extremely harsh to the ears of people with relative or absolute pitch."

"That's right," Qiu Ting Lianzi agreed with Haibara Ai's opinion. "The twelve equal temperament is easier to show cowardice at this time, but it is not so hopeless when playing generally. In addition, because of the uniform scale difference, it does have its convenient advantage when transposing. , so it's more popular. But if you want precision, you must use more luxurious methods to tune."

"What is the Twelve Average Law?" Ayumi asked Haibara Ai nervously.

"The frequency before each scale of the piano is related. Generally speaking, the pitch frequency of each key and the sound produced by the 12th key is exactly 1:2. Some specific ratios are used to set the sound frequency between adjacent keys, such as 120:128:135:144:150:160 (do to fa), but although such a frequency design sounds good, it is not practical in modern society. The application suffered from difficulty in transposition due to the uneven pitch variation of each key position. Thus the twelve equal temperament was born - each key is a specific multiple of the frequency of the previous key, and the thirteenth key Exactly twice the 12th key, so that the frequency difference between all adjacent keys is uniform and can be adjusted up and down freely. But at the same time, this also makes the pitch of the twelve equal-tempered adjustment and the initial The perfect combination adjusted by pure temperament is somewhat different, some sounds are higher, while others are lower. Among them, la is generally used as the reference origin of 440Hz, and among the twelve equal temperaments, this is exactly the higher equal temperament. A node. So a poorly maintained piano is prone to flaws in those lower well-tempered keys if the initial la is not adjusted to a higher position.”

"Then, what is the absolute pitch and relative pitch?" Mitsuhiko also asked his own question, but he was handed over to the boy in the eyes of Ai Haibara because he just said a long sentence and was too lazy to perfunctory the boy. Chiyu.

"Let me give an example, in music, if we quantify the pitch into frequency, then people with absolute pitch will know that the sound is between 430-450 after hearing la, which should belong to the area of ​​la .And the owner of the relative pitch...they can't tell it's la after hearing la, but if you play him another do, then he can tell you that the sound you played before is more specific than this sound How tall."

[In simple terms, the relative pitch needs a reference pitch to compare with the heard sound, in order to judge the pitch heard~www.NovelMTL.com~ The absolute pitch does not need a reference pitch, it can be made up by the brain A reference pitch that directly determines the pitch heard. As for Qianyu...his auxiliary unit is an enhanced version of absolute pitch, those sounds are completely quantified into specific frequencies by it, and there is no need to brain-fill the reference pitch like a normal absolute pitch, but you can directly see how much the sound is. high. 】

"Well..." Qiu Ting Lianzi walked to the piano and pressed a row of keys at the same time. "It looks like it's something from the twelve equal temperaments... Oh right, rigid boy, can you help me take out the thermos bottle in my bag and pour some water? And the pocket for the thermos. Bring the throat lozenge inside."

"Well, okay." With this answer, Qianyu obediently walked out of the team and walked towards Qiu Ting Lianzi's backpack.

"Did you use this piano for the competition?" Qiu Ting Lianzi turned her head and said to the children who were still in the team.

"It shouldn't be," Maolilan, who was beside him, responded. "At that time, it should be the piano in the auditorium."

"Another piano?" Qiu Ting Lianzi said after thinking for a moment. "Ayumi, when you sing, raise the pitch a little bit, you don't need much, can you do it?"

Before Ayumi could respond, they heard Chiyu's inquiries.

"Miss Lianzi, may I ask... Has anyone touched your kettle?"

……

Asking Ayumi to raise the pitch a little is to make her voice more pronounced and at the same time to make the sound quality better. Like when a symphony orchestra plays with 440Hz as the reference la pitch, soloists tend to reference 442 alone. And some bands even use 445Hz as a performance benchmark to improve the sound quality of the band.