Reasonable test PK and effective identification method for private room audio
In order to select a good sound suitable for their own place, the investors can be described as different ideas. In the absence of a shady scene, it is usually the case that many audio companies move the audio equipment to the venue, in a room or in each room according to a room, after the various sounds are adjusted, the so-called "jury" organized by the investors. Let's try the audition one by one to identify the pros and cons. This form of PK can be called "soft PK", just like the domestic martial arts competition in the early years - each "Wulin master" plays a routine, the judges look at which posture is beautiful, the action is strong and gives a high Points, so often let some "flowers and fists" people get the "national champion" with their skill, appearance and body, and this "champion", in the practical aspects of kung fu skills, may not be extraordinary.
In fact, this soft PK of sound is not scientific or reasonable. Because the size, layout, and decorative materials of the room all affect the characteristics and performance of the sound, most of the effects are negative without a reasonable sound field. Sometimes in the case of a bad sound field, even if the speakers are placed in different positions in the same room, the listening sound is different.
So when some audio equipment is selected for a room that suits its characteristics, it will sound very good. However, some audio reluctantly "divide" into a room that is not suitable for its characteristics, then its sound performance will be much worse. Although the current DSP preamps are almost all with parametric equalization, but the on-site rush mode and many external factors, technicians often do not necessarily change the serious defects of the sound field.
In the process of practical research and development, application and comparison, the human ear will also be fatigued and the scorpion will be tired. After listening to and singing four or five rooms in a row, even experienced experts will influence judgment due to factors such as fatigue or mood swings. If it is a few batches, a few days to PK, then it is more difficult to pick the best or the most comprehensive sound. Because people simply can't remember the sounds they've heard in the first few days, and what is the slight difference between the sounds they hear now. However, between the pros and cons of the sound, it is often the difference in the feeling of subtle sound quality.
Some engineering companies said: "PK is not a sound but a relationship", this is not without reason!
After several days and several rounds of PK, some “experts†and the heads of the investors were even upset when they were tired to hear the sound. Some investors have initially hoped that more audio manufacturers will participate, but PK is in the middle of the stage, but even the audio company's phone is not willing to pick up - in fact, he does not want to find more audio to compare, but he does After losing the direction of aesthetic fatigue, I even felt that the sound is almost the same. Who is better, but ultimately, not only did not choose a better sound, but instead of violating the original intention to let the sound company with good relationship or promotion of public relations take over the project. Even if the sound of these companies may not be too good!
In fact, if the "soft PK" method is used, in addition to the relationship that can influence the choice of the investor, the technical experience and communication skills of the PK live tuner can also be opportunistic, investment, and comprehensive factors. Eventually misleading investors to go in the wrong direction.
The specific equipment comparison selection and selection methods are as follows:
First, prepare a switch device for selecting equipment (also called PK machine, you can directly switch one or a group of speakers and amplifiers with remote control), or prepare a set of PK lines with similar functions (PK line practice) See below for details. In the same venue, put the speakers together, use the same source (CD or VOD), the same preamp, the same or a few different types of songs, the same amplifier (best It is a professional power amplifier with power, and the same channel output, through the instant switching to compare the sound quality and sensitivity of the speaker, and compare the sound of the speaker.
The PK's pre-stage high school bass is hit to the 12 o'clock position (ie, no adjustment), and the direct-out method is used for comparison. Because if the speakers are not tuned, they are good to sing, and then fine-tuned to better sing better. Remember: the two channel output terminals of the sound source (CD player or VOD song computer) should be inserted into a two-in-one lotus head, and only one line is used to connect one of the channels of the amplifier, because modern recording often takes Different sounds are recorded in the left and right channels, so the sounds of the left and right channels are often different. The guitar sound of the left channel may be strong, and the bass of the right channel (bass guitar) will be more prominent. The sound on the left is ringing!"
If you use the left and right signal lines to connect to the left and right channels of the amplifier at the same time, it is unreasonable to use the two channel channels of the amplifier to switch between the two speakers, because even the two speakers A and B are completely In the same way, you will also feel that the guitar on the left side of the guitar sounds crisper because of the way the CD song is recorded, and the bass on the right side is low, which misleads itself and creates misunderstandings.
The advantages and disadvantages of the speaker can be measured from the following aspects:
1, the sound quality of the speaker is good (full, clear, clean, soft and well-defined, good elasticity), the sound is accurate (balance, natural), the high degree of reduction is good, and vice versa. The sound quality of the test speaker should use the most familiar track, usually in Europe and the United States, the original popular song (CD), because the music elements of this type of song include vocals, drums, electric piano, bass, Guitars, etc., cover all the sounds in the frequency range from 40Hz to 20KHz. As long as the sound of the speakers is good, these music elements can be properly played and expressed. By instantly switching the contrast, you can hear the difference of the sound of the speakers. Your own voice is actually the best sounding tool, only need to go from -5-6--7-1--2-3--4-5--6-7-... From high to low, the singer is sung, and it is equivalent to detecting and comparing the balance and pitch of the two speakers. Of course, you have to make sure you can hear if you are singing or not.
You can switch to the B-speaker to audition after the whole stage of the A speaker, or you can switch to the B speaker and sing the same sound with the same strength after the A speaker sings a tone. The advantages and disadvantages of easy naturalness and win or lose.
The most important function of the entertainment room speaker is singing, so singing is easy, effortless and effortless is the primary consideration. But vocals can only test high school bass, not to go to super highs and low to subwoofer. If you want to test the performance of super-high and subwoofer, you must use electronic dance music or a pure live version of the jazz drum to match the bass.
Usually, the speaker with reasonable design, accurate phase and flat frequency response sings the vocals easily, transparently, plump, smooth and natural, while the speakers with unreasonable design and unbalanced frequency response curve sing naturally. Some sounds sing because they are too prominent and feel weird, and some sounds are difficult to sing because of lack of sound (frequency response).
In practice, the overly prominent sound is due to the peak of the speaker's frequency response curve. The peak of this ridge is the easiest to make the microphone whistle (flying microphone), and the singer is because the frequency response curve of the frequency band has Deep valley (ie lack of sound). "Peak and deep valley" are all taboos of sound, directly destroying the balance of music and natural beauty.
Test to understand the sound characteristics of the speaker In addition to the vocals, musical instruments, and comprehensive songs, it is very reasonable to test the speakers by personally singing, because people know the sound characteristics of their own. Ordinary people may not be able to sing very well, but most people are clear about what is "singing well" and what is "singing good". If the private room speakers are singing hard, the impact on future operations is absolutely negative. This may be a fatal congenital deficiency.
2, the speaker sensitivity is higher than the sensitivity is better. Because the high-sensitivity speaker is easy to push, and the low-sensitivity speaker has low efficiency, it needs more power of the amplifier to push it. It consumes power and increases the temperature of the speaker coil, which brings more unstable factors. .
The sensitivity of the speaker is the same as that of the same amplifier, the same channel, and the same source. The sound of the speaker with high sensitivity is relatively large, and the sound of the speaker with low sensitivity must be relatively small.
3, the speaker power is larger than the power is better. Because the power of the speaker can withstand a large power, it can be more stable and durable in practical use. Even if it is loud, it will not be distorted, it will not be easy to burn out, and the power of the speaker will be slightly louder and more distorted. Burned out.
A: Understand the technical specifications of the woofer in the speaker and compare it. If possible, you can disassemble the speaker and check the contrast speaker unit. Under the condition of using traditional magnets (ferrite), the large magnet and the voice coil have large speakers. The woofer with relatively large power and small magnetic voice coil is relatively small in power.
4. In the case of reasonable quality, the speaker has high sensitivity and high power, high cost, high reliability, and high use value. The sensitivity of low power and small speaker is low in cost, slightly stable, and low in use value.
5, private room speaker sound quality, clear, soft, layered, flexible, sound transparent and natural, singing is easy and not whistling (commonly known as: Fei Mi) as well, and vice versa. As a private room speaker, the performance of the microphone vocals is very important. It is better to sing easier than to sing hard, because the general public does not necessarily understand music or art, but the speakers can't sing well, singing is easy or not, singing sounds. Is it natural or weird, most people know it.
6, the frequency response width must be better than the frequency response is narrow. For example: A speaker's frequency response from 43 to 18KHz, and B speaker is 60 ~ 16KHz, the balance is close, then the sense of hearing must be A speaker is lower, the sound field is wider, you can hear more music elements, in contrast (Instant switching can be seen) B speakers may feel "listen to some music elements", and the flexibility of the sound may be less exciting than the A speaker.
Second, pick out the best performance (vocal tune, instrumental music, dance music and microphone vocals) the best speaker, use this speaker to compare PK amplifier. The methods and measures of pros and cons are as follows:
1. Use the same sound source, the same recognized best speaker, the same song, PK machine or PK line to instantly switch to PK to compare two amplifiers, pay attention to the switching sound quality, tone and music dynamic changes, and finally pick out The best performance amplifier on site.
2. If the power of the amplifier is large, the sound of the speaker will be strong and powerful, dynamic and the rhythm is clean and neat, while the power of the low-power amplifier will be imaginary and lack of dynamics.
3. The power of the power amplifier is high, the power is low, the power is low, the component level is high, the sound quality is high, the cost is high, the component level is low, and the sound quality is low. In addition, the power amplifier with a large enough power to push the speaker in addition to the sound is good, it will make the sound system more stable, but the power is equal to the speaker or less than the speaker, the sound is easy to be distorted, and it is easier to burn the speaker (civil HiFi's amplifier is exceptional).
4. One of the most important indicators of a good amplifier is that the sound quality is clean, clear, natural, and clearly structured, while the poor power amplifier is not clean and the sound is rough. In the case of relatively good sound source and speakers, discs (music), the performance of the power amplifier is easy to PK identification. Good power amplifier is not only the power annotation, but also the material (component material) level is relatively high, so it can have a clean, clear and well-defined sound base, while low-cost power amplifiers use low-grade, low-priced yuan. The device is basically a clean and well-defined taste.
Third, pick out the best performance of the best speakers and amplifiers, with the best speakers and the best amplifier to PK contrast microphone, the contrast microphone must be personally auditioned, because people know their own voice.
Use the same amplifier, the same speaker, the same front stage, and insert two different microphones at the same time. The right and left hands can be sung at any time to compare. The quality of the microphone can be measured from the following aspects:
1. The vocals are clear, transparent, natural and easy to sing, and vice versa.
2. Wireless microphones are more expensive than wired microphones, and sound and stability are less likely to be done.
3. The same wireless microphone, the cost of the U segment is relatively more stable than the V segment. Anti-fall and anti-shock is more useful than non-resistance.
Fourth, pick out the speaker, amplifier, microphone, and finally to the predecessor. The pre-stage plays a decisive role in the singing effect in the sound system, and most of the technology of playing the private room audio system is related to the pre-level. It is the management and control center of the private room audio system. The relationship between the speaker and the preamp is like the "innate" and "acquired" conditions, and they depend on each other and affect each other. The pros and cons of the predecessor can be measured in the following aspects:
1. The more pre-level functions, the better in theory. The front stage is the tuning processing center of the private room audio, which plays an important role in adjusting the sound and the protection of the speaker amplifier.
2. The more equalization the segment is, the better. Because most of the private rooms are not necessarily decorated according to the technical requirements of sound field construction, the defects of the sound field are inevitable. To compensate for such sound field defects, there must be sufficient balance points to adjust.
3. The DSP pre-stage with parametric equalization and optional frequency points is better than the fixed frequency point without parametric equalization. Because the adjustable frequency point and parametric equalization allow the engineer to make more precise tuning according to the sound field characteristics of the room, the sound can overcome the defects and shortcomings of the sound field, and the sound is played normally and the practical effect is better.
4, whether it is DSP or analog pre-level, the sound is clean, transparent, natural as well, and vice versa. The naturalness of the sound of the pre-level is very important. This is the basic problem. It is like the foundation of a person. If a person is beautiful, he does not need to dress deliberately and does not need to wear brand-name clothes. The appearance is very comfortable and pleasing to the eye, but If you have a bad sense of five senses and short hands and feet, it is also weird to let you dress up or wear a brand name.
5, DSP's effect concept and function is almost no big difference, but the technical and artistic feelings of the debugger are higher. People who feel good may be able to call up the effect of 90 points. People who feel bad may only call out. 70 points effect, even can only adjust the effect of 40 points.
This kind of sound selection method is called "hard PK". Just like on the platform, winning and losing is based on the true skill. Unlike soft PK, it can be opportunistic and misleading to mislead others. Only this kind of hard PK is both time-saving and direct and effective. Because the sound quality is good and bad, it can be distinguished by switching back and forth several times, especially singing is not easy, natural unnatural, good to sing. The sound is not transparent, and it is possible to judge the pros and cons and win or lose by instantly switching the comparison.
Usually, manufacturers who can make speakers well usually have a fairly high level of understanding of sound perception. Therefore, it can be said that the best manufacturer of the speaker, its power amplifier will not be worse. And the sound box is well-made, the supporting application ability and technology of the system are not necessarily weak. Even if they don't produce the power amplifier, the OEM's power amplifier will be excellent (Martian and Lisu, Tebaosheng and other foreign famous brands will not Direct production of power amplifiers, and quality characteristics can be matched with their own speakers. Therefore, the speaker and amplifier power amplifiers that use the best comprehensive performance of the speaker will not detour.
Of course, in the case of sound quality of the sound is good, the sound effect is not absolutely the best, because everyone's preference for sound is very subjective, just like a man looks at a beautiful woman - Yan thin ring fat, each has its own beauty, Turnip greens, all have love!
Therefore, if a larger entertainment city is possible, it is best to use a good speaker with the same brand and different flavors to give more choices to customers of different tastes (usually the size, size and decoration of the room can achieve different sound effects) . There is no such thing as a big society. Some people like Yangchun Baixue, and the lower Liba people also have an audience.
Therefore, adjusting the sound of the sound is a technique that contains artistic ingredients, but the selection of a good sound is also a profound knowledge.
Fortunately, the function of the front-end is getting stronger and stronger. As long as the sound of the speaker is good and the decoration is not too bad, the masters of the project can call out the sounds and effects that the locals like to see, according to the requirements of the investors. Decaying is magical. The value and significance of the ultimate manifestation of technology is also here.
In today's increasingly competitive world, the sound effects of the casino are too important. Mature investors will not deliberately choose a poorer sound in order to reduce costs, because for the entire entertainment city, the investment of the audio part is not a "big head", but after the opening of the venue, it can be a hit, successful, and long-lasting The sound quality and stability of the sound is enough to affect the success or failure. In the era of PK's frequent audio and entertainment industry, the interpersonal relationship is very important for the audio company. However, if there is a set of sound quality effects at hand, the hard indicators such as power, sensitivity, frequency response, and sound pressure are all good. So whether it is a soft PK or a hard PK, the result will be half the effort!
For investors, good sound is definitely the fundamental magic weapon for winning and winning.
Investors and audio companies are ostensibly buyers and sellers, but in fact they are a community of interests. Multi-faceted communication, proper assistance, reasonable coordination, and mutual benefit are the only way to achieve a win-win situation.
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