How is the mixer made?

What you need to know, the mixer's knowledge system includes:

music

This is the core and the place that determines the height. This is the internal strength and the source. Generally excellent mixers are also learning music.

Because this part is deep into the bone marrow and invades the soul, you need to be touched by countless good music, switch yourself in rationality and sensibility, understand good music, and analyze good music, so that there is progress.

So I am afraid that I will be occupied by countless jobs, I can't enjoy music, learn music, and even lose the ability to be touched by music, but I am afraid that it doesn't work... I almost never have time to listen to music, and work has already made me The ear is in a state of fatigue for a long time, which is not desirable, but it is also helpless.

Physical mathematics

Psychoacoustics, chamber acoustics, and instrumental acoustics are the basic courses of the mixer, just like learning Chinese with Pinyin.

For example, in today's two-channel stereo system, I often have a mental retardation and ask me to copy the vocal sound to the left extreme pole. Why is there no side width effect?

That's because he doesn't know the principle of two-channel stereo. The physical principle of the two-channel stereo image in the center is to play the same volume without time difference. He re-does the software automatically does not stink. If you feel that you have paid for your face, you have to pay back.

It’s not that my mouth is too poisonous. Many people who want to learn are too anxious and read too little. It’s like the Chinese saying that it doesn’t go down the flow. Non-student people start to recite the moonlight in the lotus pond.

I picked a part of the textbook that I wrote for my teacher. As a basic knowledge of the mixer, I can see it...

In the two-channel stereo system we need to simulate the three-bit space with a two-dimensional recording. Because the position of the sound source in this system is strictly limited, it can only be slightly larger than the area where the speaker is placed, and only the position information on the horizontal surface can be reproduced.

Orientation of direction

The human ear uses sound waves to achieve different orientations of the ears for precise orientation. When the sound is not in front of the listener, it will first reach an ear that is closer, and then reach one farther away. The time difference between the ears is called ITD.

The binaural intensity difference (IAD) works in conjunction with the time difference to help locate the direction of the sound source. It is caused by the difference in sound pressure levels at the ears between the high frequency components of the sound. Due to the occlusion of the listener's head, some frequencies of the sound will diffract around the head and cause the two ears to be inferior. This phenomenon is called the "head effect."

For frequencies below about 800 Hz, humans mainly rely on time difference positioning. In the range of 800 to 2 kHz, the sound signals received by both ears are simultaneously affected by the time difference and the intensity difference. Above 1250 Hz, the effect of the intensity difference is more and more important.

The time difference between 2 and 4 kHz and the difference in intensity work together. The higher the frequency, the stronger the influence of the intensity difference, but in general, the human ear has poor sound localization ability in this range.

The intensity difference above 4 kHz has become the main effect, and our positioning ability is gradually increased above 4 kHz until the upper limit of the listening range of the human ear.

Therefore, the perception of frequency below 500 Hz is more and more inaccurate, and the positioning of about 3 kHz is also poor, because the spacing between the ears is very close to the wavelength of 3 kHz. The time difference is judged to be unstable. The positioning ability above 4 kHz will be better, the minimum identifiable angle is 1 degree to 2 degrees, and the accuracy of the two sides and the rear is poor.

Extended reading

Recent research has shown that the human body can also generate physical information for sound localization.

The shapes of the various parts of the body are different, and the angles between them and the ear canal are different, forming complex reflected waves and scattered waves. These waves all affect the sound of the ear canal, and our brains can help us determine the direction of the sound source after dealing with these tiny differences. When the sound comes from behind, the reflection of the sound from the raised ridges on the auricle cannot be produced.

In fact, when the direct sound comes from a position more than 130 degrees from the front axial direction, the auricle blocks these direct sounds from entering the ear canal and the ridge line on the auricle.

Therefore, through the absence of certain frequency components, the auricle makes us feel that the sound source comes from behind. However, our judgment on the distance and positioning of the side and the rear is not accurate, which may be caused by the lack of certain frequency information or the lack of collecting frequency information.

Effect principle

This is a thing that works once and for all, but has to keep up with the times. Every effect has a soul. There is no omnipotent effect. The principle is the same, but the sound is strange. This requires a lot of practice and understanding, until they are like your hands and feet, connected with your blood, heart, hands, sounds.

philosophy

Philosophy - overcorrection, this is the most profound words that my teacher Zhang Xiaoan gave me the most, the mixer can not be too focused on a certain point, to move the Mengsong, to fight four or two. The mixer should stand on the highest level and look at the overall situation. The highest state is not the most important aspect, but the balance between unexpected and reasonable. Balance is the most difficult. The people know this from thousands of years ago. The doctrine of the doctrine of the mean is unbiased, but there are several that can be achieved. Borrowing Zhou Huajian's lyrics: a word, a lifetime...

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