Apple Studio Display, Buzzing sound or Electromagnetic interference (EMI)

My Apple Studio Display has been having a buzzing problem in the left speaker, this happens randomly, no matter what I'm doing, it can be two or three times a day, or sometimes it doesn't happen. I still can't figure out what the problem is. I've tried everything, connecting the monitor to different power outlets, not mixing the power cables with the thunderbolt to avoid interference, I've connected the monitor to all the thunderbolt ports on my Mac Mini M2 Pro, but nothing works.

I've taken the Studio Display to technical service and they sent it back saying that 'they connected it to the apple server' to run the relevant tests and it doesn't report any problems.

Any ideas?

In my setup I have the following:

1 LG 27-inch 4k monitor connected via HDMI

1 Keychron keyboard via bluethoot

1 Logitech mouse (with the wireless receiver)

My iPhone 15 pro Max

Could any of these devices be generating electromagnetic interference? Or it's just a fault with the monitor speaker. The funny thing is that it only happens on the left side.

Here is a video that I managed to record recently. It has been the time that it has lasted the longest. At the end of the video I tell my brother that this time it lasted a long time, that's what you can hear in Spanish. (Maybe you should level up your volume).

https://www.youtube.com/watch?v=dyKbeIaDnwk

As Thanos said: They called me crazy.

Luckily I was able to record this on video and send it to Apple technical support directly from the web, now everyone can hear it, it wasn't in my head.

The technical support people have the theory that it may be my Mac Mini that generates the problem, but this does not convince me, I have read more posts from other users commenting on buzzing problems no matter which device they connect it to.

The last test I have left to do, if this time they return the Studio Display to me again, would be to connect it to my iPhone 15, thanks to the USB C, I can play the image, it would be the only way to rule out that it is not a problem with the Studio Display, but with the Mac Mini.

I'm sorry for my poor english, I hope you can understand me