Professional audio or audio system at home entertainment and organs of enterprises and institutions, most of the engineering design and installation of good, sound operation personnel to carry out regulation, overall system design and installation specification is to reach the design standard, it should be said that the quality of the system is able to guarantee the. Sound reinforcement due to operating personnel's professional quality, truly qualified tuner units and rarely, so often due to improper operation of the poor acoustics phenomenon, serious and even lead to damage the audio equipment. Provisions of the State Department of labor and Social Security No. 6, sound mixer occupation certificate is needed. Our country has promulgated the tuner occupation standard sound, editing and publishing audio mixer occupation skill appraisal of teaching materials, the following elements according to the actual sound reinforcement on the occupation audio mixer operation.
A, sound mixer occupation code
1, loyalty, dedication.
2, careful operation, take care of the equipment.
3, solidarity and cooperation, respect teachers and students.
4, work hard, study innovation.
5, law-abiding, enthusiastic service.
The sound mixer occupation on the surface is broadcasting sound in the operation of equipment, in fact it is the transmission of information tools, conferences, lectures, reports, news release, performance and so on are the purpose of it, actually sound regulation related to ideology, sound art is divided to professional institutions. The sound mixer occupation morals how is directly related to the amplifying effect, a good sound engineer must strictly comply with the above occupation code.
Two, the sound system checking before start
Boot before we must check voltage power supply is normal, should stop the operation and notify the electricity sector such as found in the working voltage power supply voltage is higher or lower than the system equipment, wait for the power supply voltage is restored, began to prepare for the sound system power supply. Check the equipment sound system switches and knobs position then, sure no problem and then open the power switch, the switch must not blindly open the power of the state is not due to equipment caused by damage to the equipment.
Switch sequence three, audio equipment
The performance of different configuration and equipment of each system are different, the switch machine order is also different, according to the sound system specific to decide how to switch. A switch system requirements should switch according to the design request of the sound system, the switch machine sound system of the general order for reference.
Usually the boot order is: from the sound source equipment (as) (CD, VCD machine, LD machine, DVD machine, cassette tape recorders, VHS video, MD machine, DAT machine and so on), audio peripherals (limiter, actuator, effect, frequency divider, audio and video distributor, equalizer, feedback suppressor and so on), console, TV, projector, monitor, and finally the audio power amplifier (Note: the console fader must pull down). The shutdown is contrary to boot, should first turn off the power amplifier, and then close the peripheral system and audio visual equipment, finally closing the mixer. This operation can effectively prevent the open, shutdown sequence, equipments due to impact and damage, can effectively protect the power amplifier and speaker using life.
Four, control the preparation work before
Preparation of a good sound engineer in sound reinforcement before should be very meticulous, serious, first in the system to ensure the normal operation of the system, making the scheme and each path is marked, especially the level of various audio signal is adjusted, as a soldier to visualize your weapon to wipe clean ready for battle., every occupation engineer can see standard debugging method, according to the requirements of the signal amplifying adjustment.
Position and speakers, amplifier machine 1 volume control potentiometer matching, if the amplifier and speakers of standard configuration, power amplifier machine knob positions should be at the maximum value potentiometer, is often turn to the right to the maximum. The speaker should be no hum and noise, ear close to the tweeter when you can hear the sound of small current. If the amplifier and speakers are not matching according to the adjustment of power amplifier machine box power amplifier machine, usually should be greater than the speaker, the knob is not rotated to position the maximum output power amplifier machine, it is easy to cause the speaker damage.
2, the mixer of the various channels should be placed in the 0dB mixer faders, each branch input gain knobs are put in the minimum position, then to gain the appropriate position according to the input signal to adjust the size of the mixer, total volume fader to the minimum position (lower), sound at the beginning is the first step in the Clippers 0dB, then according to the need of the auxiliary Clippers in the 0dB, then the signal channel of the Clippers in 0dB or the appropriate position according to needs. The mixer sound compensation knob EQ according to the signal to increase or decrease the. Auxiliary knob to add effects and motivation according to the need of reinforcement.
3, debug source: that is, whether the sound reinforcement or the music sound, microphone or the CD or LD disc must pass through the console control, we now is the adjustment of the audio signal, it includes subjective feelings, we usually say each audio division adjustment out of the effect is that this truth is not the same the. Should first determine the output signal to sound, stereo signal through the console to sound knob according to the phase of the audio output, L represents the left