Sound System Debugging of Performing Arts Hall

Release time:

2020-05-13

Summary： There are two kinds of sound effects debugging in the performing arts hall: first the system and then the band and the voice. Today, Shijiazhuang professional audio will take you to understand the debugging of the sound system. Leaving aside the basic adjustment steps such as speaker polarity detection and phase correction, it is assumed that these two have been done, and the tone adjustment is carried out.

There are two kinds of sound effects debugging in the performing arts hall: first the system and then the band and the voice. Today, Shijiazhuang professional audio will take you to understand the debugging of the sound system.

shijiazhuang professional audio system debugging:

Leaving aside the basic adjustment steps such as speaker polarity detection and phase correction, it is assumed that these two have been done, and the tone adjustment is carried out.

Many friends like to use spectrum analyzer or spectrum analysis software to carry out the reference of balance adjustment. This method is intuitive, but it should be noted that the straight curve does not represent the beautiful timbre, because the listening curve of human ears is not straight, and the timbre adjustment of the system ultimately depends on the tuner's ear. Generally, to do so, first use a familiar CD to play the sound and listen to the difference between the sound of the scene and your impression. Generally speaking, there are some differences in the scene sound reinforcement and their own impression. The tone adjustment starts from the low frequency first, because the energy of the low frequency is relatively large, and it has a certain masking effect on the medium and high frequencies. The processing criterion for the bass tone is to ensure cleanliness first, and then consider others. Generally, most places will have some low-frequency resonance sounds, which are generally shown as "buzzing" sounds around the ears. This kind of sound will seriously damage the low-frequency sound quality and make the low-frequency sound turbid and unclean. At this time, the frequency band below 40 or 50Hz is attenuated on the equalizer (50Hz is enough for general music or band performance), and then the push rods of the low-frequency bands are pulled down one by one by one by one, pull to a certain putter and hold the position after the "buzz" has subsided or disappeared. At this time, you will find that the low frequency is much cleaner at once. On this basis, you can adjust the tone color. For example, to increase the fullness of the low frequency, you can appropriately attenuate 80Hz. In this way, due to the reduction, the energy in the middle of the low frequency and the energy in the lower part of the low frequency will be highlighted. Naturally, you will feel fuller. You should increase the intensity to make the bass "cool" at 50, do some attenuation between 60Hz to reduce the energy in the lower part of the low frequency, which can speed up the bass and make the natural sound cool. After repeatedly making such adjustments and finding a balance point, you can generally get a fast and flexible, while very clean bass effect.

After adjusting the bass, without adjusting the full frequency, it will generally be found that the full frequency sound will become more transparent than before. This is the role of the masking effect. At this time, you can find that some details that were not obvious in the original performance begin to appear. Similarly, for the full-frequency timbre adjustment, starting from the middle and low frequencies, because compared with the middle and high frequencies, the energy of the middle and low frequencies is sufficient. If you don't do it well, the sound will usually be blurred. The middle and low frequencies are processed by cleaning it up. Generally, there are 3 frequencies, 200,400,600Hz, about 200Hz generally shows a "boom" sound, which affects the clarity of the human voice. Some attenuation can make the sound clear. About 400Hz generally affects the firmness of the sound. After more of this, the sound will show a little "scattered". A little attenuation can make the sound solid. If there is more 600Hz, the medium and low frequencies will feel a little "dirty". After attenuation, the medium and low frequencies will become pure. After doing these hands and feet, you will generally feel that the medium and low frequencies become very clear.

Next, it's time to adjust the intermediate frequency. The energy of the intermediate frequency band is stronger than that of the high frequency band. If it is not done well or the sense of quantity is too strong, the details of the high frequency will be covered up. Processing intermediate frequency is generally 1K-2K as the main starting point, because the human ear is very sensitive to this frequency band, processing is not good, it will produce hard, or hit the ear feeling. First, do some attenuation on this frequency band. At the same time, you can find that the sound has a better sense of hierarchy and the sound has become relatively round.

The remaining step is to turn up the frequency band. After the above processing, the sound of the high frequency band should feel more transparent than before, because many things that cover it up have been removed. However, at this time, it may also feel that the high frequency is a little "hairy" and "fried". It doesn't matter. First, attenuate the 4-6K, which is the most easily irritating, and the high frequency will generally become smooth, if there are still some "boom" sounds in the human voice at this time, then it should be OK to reduce 8K by a little. At this time, if you feel that the high frequency is very round, but you lack a little "sharp" feeling, then you should raise the 12K-14K or so a little bit, and you should see the light immediately.

After the above adjustment, the whole sound should sound a little HIFI flavor, and then change other music CD, adjust it several times, when playing various types of music feel very comfortable, the overall feeling is very harmonious, it is OK.

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