One, 1, received out business ceremony task to the relevant person in charge asked the celebration, the type of program; 2, inspection equipment, wires and accessories (whether normal use); 3, the purchase of related objects (such as: wireless microphone, battery number sticker etc.).

Two, on-site installation 1, power supply, avoid is connected with the lighting power; 2, the total console position: as to the display side in front of the stage, and can hear the sound signal range clear position as appropriate; 3, the speaker at the mercy of, designed according to the specific spatial region (the audience can be centralized or distributed); 4, line distribution, pay attention to the weak signal and strong signal line line don't go together.

Three, sound system test 1, to determine the connection of the equipment has been properly connected, check the equipment of the push rod, the screw is in the correct position. Then the electricity supply to electric equipment is the visual; 2, turn off the power amplifier output volume potentiometer, playing a familiar music signal (slightly adjust parameter equilibrium with the console in the mixer output (total) will return to output to the 0dB vertebral sub), Shiko pushed to the 0dB signal channel, adjusting the gain of the the mixer output level indicator is 0dB (best signal output). Check signal mixer, power amplifier, the surrounding light is normal; 3, slowly open the power amplifier of the volume potentiometer (repeat each amplifier), check the corresponding box is normal PA (also check whether each unit normal); 4, down mixer output (return to output) the volume of vertebral sub all power volume potentiometer, open to the maximum, then the mixer total output volume and return to the volume of vertebral vertebral sub slowly pushed to the 0dB, in the audience area (with the central inspection stage) Pa is balanced (phase is normal) at the same time to determine the signal pressure, music in the audience area (stage) the position is enough; four, 1, the first part of the audio test music channel test parameters: balanced adjustment mixer music signal channels, listen to the two audio signal, to determine the range of high and low levels.

2, the first vocal microphone channel test: balanced mixer parameter adjustment music signal channel, check the microphone sensitivity, observe the mixer signal lights, when the signal reaches a certain pressure, plus the reverberation effect and accompaniment music by singing voice or preliminary test, to determine the effect of voice, music, or proportion.

Five, adjust the audio processing equipment 1, adjusting the equalizer: (adjust the key link of the whole sound system also here) equalizer has two important roles for acoustic frequency defects caused by the imbalance, one is to adjust the tone, two is the acoustic feedback suppression caused by the howling sound. The adjustment of the outdoor equalizer should be adjusted under the condition of ensuring no whistle.

The method is as follows: the main PA, listen adjusted to normal level (pressure required performance), the equalizer frequency to 0dB and to control all microphone channel faders (so when howl appeared when he pulled down the frequency attenuation), holding a microphone to walk on stage, to find one by one. Call frequency.

Place the microphone on a stage (the location of the actor's performance). On the main speakers (back to listen to the box), slowly open the microphone volume, looking for a small point.

The frequency of the frequency of the call to be recorded, the sound is no longer appear when the sound attenuation, the first second times the voice and music signal tone compensation. The equalizer (after adjustment, there will be a substantial change in tone, this time should be performed according to the requirements of listening and feeling, with the parameters of balanced mixer and other peripheral equipment, two adjustment, careful and patience until you satisfied. 2, the pressure limiter adjustment: it has two important functions: one is to reduce the dynamic range of the program source, to prevent overload and distortion of the signal, the power amplifier and speaker unit has a protective effect. The two is to improve the loudness of the program (auditory characteristics can be clearly felt). In the small and medium sized outdoor performances, suggestions are as follows: adjust the gate in open to — 20dB between the compression threshold level in -10db to 0dB, the compression ratio is 2:1, the action time in 10ms, the release time in 0.3s. Specific adjustments shall be made according to the needs of the system and performance. 3), effects of the adjustment: cooperate with sound, adjust a variety of independent and mixing procedures, one by one to audition audition, recording can be used in the program's performance situation, determine the signal input and output, 1~3 selected a suitable effect, according to the practical needs, in the performance at any time from the machine out of use.

Six, the total system sound test when the equipment is adjusted, the overall sound quality check 1, the requirements of the music signal should be the strength, fullness, treble can not be harsh, bass can not be cloudy.