The debugging steps are as follows: first to understand and be familiar with the function of the console and setup methods, each button to understand its function and debugging methods, parameter settings. Then the mixing console and other equipment properly connected to the mixing console each input gain to the lowest, the mixing console each input high, medium and low equalization knob to the middle position, do not change the variables of any frequency band. Each input fader, the total output (or group output) fader pushed to the "O dB" position; with a group of sources to make the mixer work in the "O dB" output state, slowly open the gain knob, until the mixer's level indication reaches the "O dB". "O dB" stop, and then adjust the gain knob back a little, the input channels were adjusted to the above state. Increase the volume of the power amplifier slowly until the desired volume is emitted.
If the power amplifier has been turned up to the maximum working condition, but the loudness is still not up to the requirements, you can consider increasing the equipment or switch to a higher-power sound reinforcement system. Do not take to push up the mixer fader method to achieve the effect of increasing the volume, this will produce a great deal of distortion in the process of sound reinforcement will be, and it is easy to damage the power amplifier or speakers. Some hybrid mixing consoles, itself with equalizer and effects, these processing modules are relatively simple, its performance can not be compared with professional equipment, but the operation is simple, the application is very convenient.
The role of the equalizer is in the sound reinforcement, to solve the problems and defects of the sound field, it can inhibit the sound field due to the reflection of sound waves caused by a band of convex peaks, but also to enhance the absorption of sound waves caused by a band of concave valleys, so that the entire sound reinforcement system to become more "flat".
(B) power amplifier debugging
First of all, we must repeatedly check whether the positive and negative speaker line is connected correctly, because if the reverse connection not only consumes the power amplifier power and will reduce the sound power, but also seriously affect the sound quality of the entire audio system sound color. Check whether the power amplifier's heat dissipation is good, whether the fan works normally, to ensure that the power amplifier works properly. In the process of use, pay attention to the power amplifier's working condition, the power amplifier should never be in a long time in the overload platform, which is very easy to damage the power amplifier, and may even lead to the damage of the speaker. Overload indicator light occasionally light is allowed, although this will produce a certain amount of clipping distortion, but the human ear in a very high volume environment is not very sensitive to a small amount of distortion.
(C) debugging accompaniment channel
With the CD disk to play music, the mixing console split faders placed near -6 dB, this time the song and the accompanying music is roughly the volume of the normal work; but pay attention to the volume to be moderate, too loud overly easy to make people feel fatigue and intolerable. Tuner should go to different locations to listen to the effect. The music played is familiar, you can repeatedly adjust the volume (adjust the split GAIN gain) and split sound quality compensation. Until the sound effect is satisfactory, the requirements of the music effect should be strong, beautiful, treble can not be harsh, bass can not be muddy, the requirements of the song is clear, such as the female voice of the teeth clearly audible, but not too heavy. Branch fader is placed at 0 dB, the total volume fader is placed at 0 dB, adjust the branch GAIN input gain knob so that the level meter refers to about 0 dB, at this time the system reaches the rated output power. However, during normal operation, the total volume fader is generally set at -6 dB or -10 dB or less.
(D) debugging actor microphone channel
According to the microphone sensitivity and dynamic range debugging system gain, first of all, the microphone were placed in the performance of the typical orientation. Then the split fader is placed at 0 dB, according to the words of the simple volume adjustment split GAIN input gain knob to split level indicator occasionally flashing, the system just to the critical whistling point, and then the split GAIN input gain knob down 3 dB. Then adjust the mixing ratio, according to the actor's tone of the actual adjustment of the subway tone, according to the needs of the performance content to join the reverb moderately, and finally add the music, repeated adjustments to make the sound more rounded, full-bodied and hierarchical sense of the scene, until the sound effects are satisfied. In the process of the performance of the band used by the number of microphones, these microphones should be adjusted before the performance. Adjust the gain as much as possible so that the fader in the mixing console position to one, in order to facilitate flexible control. Hosts and actors should be distinguished from the microphone, some wireless microphone is a double microphone but common a receiver, should be used in a double in and double out of the connection, so that it can be convenient and flexible in the mixing console to achieve the microphone tuning respectively. In the test microphone should not be used to tap or blowing method to test whether the microphone is good, this operation will reduce the sensitivity of the microphone, and even damage the microphone.
Stage sound is an indispensable and important part of the stage atmosphere. No high-quality stage sound art to do to ensure that there is no successful display of the stage atmosphere. However, the existence of stage sound is also the product of the stage atmosphere forward development, at this stage of the two are cause and effect, interdependent. Practice has proved that the sound effect is good or bad, is the stage atmosphere to show the success of the foundation. He can not type of actors according to the voice conditions, through high, medium and low compensation and audio attenuation and peripheral equipment debugging, and achieve the ideal sound effects, in the case of actors with poor voice conditions, but also to improve and make up for the role.