Sound Skills of Mixing Console's Level Adjustment Sequence

(1) Adjustment of input level

When adjusting the input level, it is best not to connect to the speaker. First connect the earphone to the headphone jack of the mixer to monitor the output audio signal, then turn the fader potentiometers of the left and right main control channels to the minimum, and gradually push upwards. After hearing the input signal, you can monitor.

After all the audio sources are connected, turn on the system and adjust the sensitivity of each channel to receive signals. First, set the minimum sensitivity of the input channel, and then adjust it slowly. The specific method is: first set the attenuator (PAD) switch to ON, set the gain (GAIN) to -20dB, set the fader attenuator within the range of 5-10 scale, and set the sound source signal on the first channel (CD player, LD player or human voice, instrument sound, etc.) Express it at the maximum volume in the actual performance. At the same time, observe the overload display. If the display is on, the level of the output sound source signal should be lowered.

Under normal circumstances, the input gain (GAIN) should be increased to adjust its optimal level, until the peak overload indicator light just flashes at the maximum peak. But if the gain control (GAIN) is turned on to the maximum, the peak indicator light does not light up, at this time, you can adjust the gain button to the minimum, the PAD of the buffer is turned off, and then slowly turn on the gain control until the peak indicator light Flashing; if the indicator light is still off, you should check whether the wiring is correct.

In addition, when the peak overload display displays, it means that the level is still 3dB away from the overload peak level. During the performance, it is normal and good for the display to flash briefly at the loudness of the audio signal, and it is also advisable to adjust the level of the signal. But if the display flashes frequently, it means that the signal level (or mixer gain) is too large and should be suppressed.

(2) After one channel is adjusted

Push the fader attenuator to the minimum, and then adjust the other channel, so as to prevent the noise of the previous channel from interfering with the adjustment of the other channel. When all the channels are adjusted, set the faders of the left and right master channels to the minimum position, turn off the mixer; then connect the speakers to turn on the mixer; then you can push the master channel The sub attenuator is gradually pushed up to adjust to the appropriate operating level.

(3) The adjustment of the input level should also pay attention to matching

When individually adjusting the input level to match, you can't connect speakers, you can monitor the signal through headphones, then you can set the master fader to the minimum level, and then slowly increase the output level until it feels right. When all the sound sources are connected, the entire system can be turned on. Here, the matching of the input sensitivity of each signal is very important, and each channel must be adjusted separately.

(4) Use of channel faders and master faders

The position of the channel fader mainly depends on the adjustment. Generally, the setting of the channel fader has its optimal range, within which the audio signal has the smallest noise and distortion and the greatest adjustability. In the EMX series, this range is between 5-15 scales of the fader.

(5) When it is determined to enter the master fader

At the same time, attention should be paid to the display of the VU level meter. The reading of the VU level meter cannot exceed the OVU scale. If it is higher than this number, it means that the level is too high and the power amplifier will cause signal distortion due to overload. It should be noted that the level change of any input channel will affect the total output level. The final adjustment of the master fader is done in small steps, but if the master fader cannot be set at an appropriate high or low scale (less than or equal to 20 or greater than or equal to 5), it means that the channel input level has not been adjusted properly and needs to be adjusted again until the master fader Push it in the appropriate position until the VU meter has appropriate instructions.