【 Weak current College 】 sound system debugging preparation before

Sound engineering for debugging, is a necessary skill and experience and requires careful and painstaking work of the spirit, when the design and construction will comply with the requirements, the debug unreasonable is not careful, not only failed to achieve the effect of design works, but also may cause the device to work in an unhealthy state. So in debugging before you fully aware of the importance of this work.
Debugging carefully before you confirm each device is installed, is connected properly, the seriously to construction personnel ask construction legacy may affect the use of the problem; debugging carefully before you confirm each device is installed, is connected properly, the seriously to construction personnel ask construction legacy may affect the use of the problem; debugging must once again seriously reading all the equipment specification, carefully check the design drawings of dimensioning and connection methods; debugging before the supply line must be convinced and the supply voltage is no problem; debug locale not before; debugging corresponding to prepare before instruments and tools.
Sound system debugging
Sound system debugging is a key project debugging, sound system involves device up, debugging of the site is also the most problems may also be the most, so we should first concentrate on completing it. You need to prepare the instruments and tools: phase meter, noise generator, Spectrum Analyzer (with sound), Multimeter, etc.
Debug: a separate post, gradually from the sources check signal transmission, this inspection is very meaningful, because only the signal transmission in various devices, power amplifier and speakers will receive a normal to properly handle the signal, they might have a good sound quality, so doing this work, we must be patient, be sure to carefully, to carry out this step, the speakers and the amplifier connected to the first-don't worry, the peripheral equipment is the best in bypass mode. Check where you want to follow the signal, when you want to follow step by step check signal going to gradually check its level settings, gain, phase and the smooth flow of information, ensuring that each device can be fore device provides the best signal, can provide the best signal for a subordinate, in checking the signal at the same time, it should also be gradually check its level settings, gain, phase and the smooth flow of information, ensuring that each device can be fore device provides the best signal, can provide the best signal for a subordinate, in checking the signal at the same time, it should also be visually equipment working properly and that it is stable, the significance of this work lies in the fact that a single device then fails or is not stable, easier to deal with, nor jeopardize the safety of other devices, so this check will not be brought into the next.
The above is correct, you will sound and the power of exile a access system, in a smaller volume, using phase meter first check all the position box phase consistency, as the following debug ready to noise generator and Equalizer access system, ready for the Spectrum Analyzer to moderate volume begins on Equalizer access system, ready for the Spectrum Analyzer to moderate volume begins on balance on the equalizer Spectrum Analyzer to debug, test points should choose in accordance with the relevant standards, the equalizer debugging principle is: the Spectrum Analyzer to 20Hz ~ 20kHz audio, display in the halls of the frequency response curve in the test point of basic flat, note: on the point to test the volume you want to enable consistent, and record the balance of good debugging is the location of the point potentiometer frequency; similarly to a smaller volume and large volume, and then record a good debugging is the frequency of the equalizer; point potentiometer for smaller volume and large volume are additional debugging, then the equalizer debugging results recorded last several debugging results analysis data for a variety of volume amount all under balanced frequency of location, and then be tested and the frequency response curve portrayals Auditorium, the ultimate equalizer, the position of the frequency you want to record, note: debug the equalizer, mixer frequency compensation must be placed in the 0, other peripheral devices to the State, the other is in bypass is: in a typical sound engineering, taking into account the Auditorium of the decoration material absorption of high-frequency signal is weak, so it can properly be slightly above the signal 10kHz do decay.
The above steps completed, you should conduct electronic dividers for debugging. Divider debugging can be divided into high, medium and low frequency separately, the divider in the system uses different. Debug methods are differentiated, if the divider is used only for the bass sound frequency, that as long as the equalizer debugging is complete, let the bass speakers work alone, the divider bass crossover point between 150 ~ 300Hz, appropriate to adjust the bass signal gain, feel the bass volume adjustment is available, and then, together with the full-frequency system, and then to hear the bass, and wide-band smooth volume; if the divider is used in the full-frequency system, requires accurate according to the speaker manufacturers supplied parameters Lou don't set high, medium and low frequency crossover points, and then repeatedly carry out band signal gain adjustments until the band sounds are more balanced, then the reference next Spectrum Analyzer in the test point of sound pressure situation further fine-tuning.
Wait until the equalizer and e-modulus prescaler basic debugging is complete, you should begin the Auditorium sound pressure level of determination, the test points or some of the original selection, noise source should be pink noise meter, test in addition to full-band, as far as high, medium, low three band respectively select several frequency test, test goal is: the best dynamic signal, allows the system to adjust the sound reinforcement sound pressure at the point you want to achieve the design of the sound pressure level, at the same time to refer to high, medium, and low frequency points, then the equalizer and adjust a few electronic dividers, if each test point sound pressure level deviation of results, namely sound field uniformity is not good, they should be carefully analyzed and appropriate improvement, first from the architectural decoration of the construction process, if there is a large deficit, thus affecting the quality of the sound field, it should propose feasible measures: If there are no decorative obvious defects, or have certain deficiencies, it cannot be improved, you should inherit from the speaker set-up, and point to and installed form for analysis, the analysis includes speakers and four of the distance between the speakers, sound installation locationBox of links to and frequency characteristic and so on, the following is based on the actual engineering common speaker set-up, installation and use of diagram for a comparison.
The following is the microphone and the effects of debug, debug for the microphone, you can use for classification, vocal wired microphones as long as there is no audible of line noise, sound quality good, the effective range of acoustic feedback can make use of the frequency spectrum analyzer for monitoring and making the appropriate frequency and location of records; musical instruments using wired microphone must and, together with the East team with debugging, and various musical instruments using the handset model and pickup distance records; wireless microphone must work together with debugging and bands, and various musical instruments using the handset model and pickup distance records; wireless microphone debugging should pay attention to: the antenna location and reasonable, and drop tube use appear dead point location (well documented), accept-signal level gain to fine tune the noise reduction can be adapted, the best place to look for again and again, for the effects of debugging, the principle is to ensure that the input signal gain can cause effects get better dynamic period of sound signals, and you want to have a certain amount of allowance, the effect of the mixed signal output according to the requirements set. As regards the effects of specific effects options and parameter setting, you should make some crude test, and then under programs require to selected, just a note: effects of reverberation time and delay of having a set of no more than a certain range, so as not to affect the clarity of language and signal continuity, microphones, and effects for debugging, should also include back to listen to the system of debugging, the principle is: let back to listen to the system's frequency response characteristics consistent with the primary amplification system, sound pressure level actors (including bands) can clearly hear their voice, not too large, you can create additional acoustic feedback, etc.
For compressors for debugging, it should be in the system above the basic device set for, generally works, the role of compression is to protect the power amplifier and speakers, as well as the sound box and the sound of smooth, so when you are debugging set compression starting first level, usually don't set too low, certainly too high will reduce the protection function, specific settings should regard various compressors for adjusting range and signal, secondly to set compression boot and resume times, usually start time should not be too long, so that protection is not timely, the recovery time is too short, so as to avoid damage to the sound effect; then to set the compression ratio, General Engineering, 4: 1 set, the compression of the noise gate set to note: If the system does not have a large noise gate is closed; if there is a certain amount of noise, noise gate threshold level setting is low, so as to avoid the phenomenon of the intermittent sound reinforcement signal, if the system noise is large, it should be from the technical aspects of the construction, alone cannot resolve by noise gate, and other settings can be set according to the different requirements of the surface.
Other device debugging a no longer a detailed introduction, in General, debugging, you must carefully read the product descriptions, gradually and meticulous fine-tuning, without undermining the fundamental sound field conditions, the selective use of audio processing equipment to meet the design requirements.