I never thought forty-seven minutes would be so long, and I'd tried my best to empty my mind and ignore the song in my ears, but it was so bad.

Zhang Yajing is an absolute piano music expert, and after listening to it for forty-seven minutes, she said directly to us: "This song has also been adapted. ”

"Adapted?"

I frowned suddenly, this song is already disorganized, and there is no standard version as a comparison, how did Zhang Yajing judge that this song has been adapted?

Subsequently, Zhang Yajing used very professional knowledge and professional music software to convert this audio into a frequency response curve, which can more intuitively see the high-bass and low-pitch changes of this music.

Zhang Yajing pointed to a frequency response curve at the 20-minute position and said, "Although this piece itself is a particularly chaotic and discordant transition between high and low tones. But if a song is discordant from beginning to end, then in a way, it is very harmonious. ”

Although Zhang Yajing's words are a bit "relativistic", they are indeed very reasonable.

Then, Zhang Yajing continued: "So twenty minutes of music, about three minutes long, is very strange. The three-minute music seems out of place with the whole song, and while it's normal, normal becomes abnormal in a completely dissonant song. ”

Li Meng and I couldn't understand it, so we could only nod and listen to her continue.

For the first time, I felt that not being cultured was a terrible thing......

Next, Zhang Yajing told us a lot from the perspective of professional composition, and the summary is that this "Black Sunday" is very close to the original, and after speculation, it is very likely to be the original.

But even so, there is a three-minute audio that has been adapted and added.

This is arguably the only clue.

However, Zhang Yajing suddenly said to us: "This song really makes people irritable, and it would be a bit exaggerated to say that everyone who has listened to it will commit suicide." However, if you have a mental illness or mental illness, and your emotions are very unstable at the time, you will indeed have suicidal tendencies. ”

If this case really can't find any key clues, it will be closed with suicide, after all, there are many reasons for suicide, and we have all seen all kinds of strange reasons for suicide.

It's just a pity that Ning Xiaobai, a little girl in her twenties.

The results of the autopsy did not find any suspicions, Ning Xiaobai did die of suffocation of piano strings, although theoretically he could not strangle himself, but if Ning Xiaobai was in some kind of mental illness or psychotic attack at the time, it was not completely impossible.

Nothing can be judged by the time of death, if there is really a situation where Zhang Yajing assisted suicide, she can call the police an hour after Ning Xiaobai's death.

On top of that, I have no evidence to make the accusations.

Although there is a metaphysical possibility of "death music" in this case, we can only close the case by suicide.

In the office of the Serious Crime Unit, we were not in a very good mood because this was the first suicide case since the establishment of the Serious Crime Unit.

Anyway, this is Ning Xiaobai's own choice, maybe she really gave up on herself. Whether it is the family environment, the problems in her own life, or the pressure of her studies, she chose this way. ”

I took a deep breath and tried to make my mood better, but also hoping to make everyone's mood better.

It's evening now, and we can get off work without any cases. However, just after experiencing this incident, it is estimated that Xue Hang is not in the mood to invite guests to dinner.

Back at home, I lay in bed with the case still in my mind.

The remaining doubts in this case are where the song "Black Friday" came from, and whether there was anyone to assist Ning Xiaobai's suicide.

Perhaps these have become the eternal suspicion of this case.

Late at night, I was sleeping soundly at home when my phone rang next to my pillow.

The midnight phone call must have been urgent, so I sat up abruptly and reached for my phone.

The call was made by Lin Zifan, and the time was half past twelve in the morning.

"Hello? Zifan? Is there a new suspicion in the suicide case?! I answered the phone, and before Lin Zifan could speak, I asked directly.

"Team Qin, there was a murder at KTV, maybe it was related to this suicide case." Lin Zifan's firm voice came from the phone.

"Where's the location? I'll go over now. As I asked, I rolled over and got out of bed, turned on the light and got ready to change my clothes.

As a criminal police officer, police intelligence is an order, and I am used to being on call 24 hours a day.

"Marriott KTV." Lin Zifan said slowly.

I hurriedly drove to the scene of the crime, Marriott KTV is a relatively high-end KTV in Ningzhou City, unlike the mass sales KTV that can be seen everywhere, Marriott KTV has a higher price, suitable for business gatherings, not suitable for family gatherings.

It's late at night, and the Marriott KTV is still brightly lit.

However, what is disturbing is that two police cars with flashing red and blue lights are parked outside the door of Marriott KTV.

Push the door and walk into the hall, it was very quiet inside, not a single song could be heard, and there were police standing everywhere.

"Team Qin! This way! ”

As soon as I entered the door, I saw Lin Zifan waving to me, and followed him all the way to a private room on the third floor, where the flashing lights of the technical team kept flashing, and Ren Qiushi was conducting an autopsy on the scene.

This private room is very large, and the decoration is very comfortable and luxurious, and the air is very strong with the smell of alcohol.

The display is black with a large pause symbol in the center. The long table was filled with wine bottles, as well as several fruit bowls and plenty of snacks.

According to the preliminary judgment, there has just been a large-scale KTV party here, not to mention more than a dozen people.

A man was lying on his side on a large, comfortable couch, covered in blood.

"What's going on?" I asked, puzzled.

"Half an hour ago, I received a report from a waiter that someone had died here." Lin Zifan said in a deep voice.

This made me even more puzzled, I looked at Lin Zifan in a daze, and asked, "You just said on the phone that this case is related to Ning Xiaobai's suicide?" ”

Lin Zifan nodded with a serious expression, and said in a deep voice: "Team Qin, you come here." ”

Lin Zifan took me to the song machine in the corner, gently pressed the play button, and the next second, the four speakers on the ceiling of the room sounded at the same time.

A 360-degree surround music sounds, making people feel immersive.

It's just that I don't like the immersive feeling because the song is just so bad......