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A mixer, no matter simple or complex, high-grade or low-grade, must master the use skills and experience of the mixer in order to give full play to its performance. The following mistakes must not be made.

1. Press buttons and adjust various knobs randomly

Although the mixer is simple and complicated, the number of channels (channels) is different. When we are not familiar with the sound station or the connection method of the field system and the use requirements, we must not press the buttons and adjust various knobs randomly.

As the core equipment of the sound system, the mixing console has different connection methods for different systems. When the system commissioning is completed, the relevant knobs are already in the working state. If we press and adjust them rashly, their working state will be damaged. In light cases, the effect will be damaged, and in serious cases, the silence and system equipment will be damaged.

2. Random channel gain knob

Generally, each input channel of the mixer has a gain selection button (with no attenuation and attenuation of 20dB) and a gain adjustment knob. The two buttons are used to control the size of the audio signal entering the channel. If the signal is too large, the input amplifier will be saturated and the audio signal will be seriously distorted; If the signal is too small, it will either make the sound very light or reduce the signal-to-noise ratio, which will affect the sound reinforcement effect. Do not adjust the channel gain knob randomly.

The correct method should be: select the gain selection button according to the type and size of the input signal. There are two options for this button. If it is pressed, the attenuation will be 20-30db (depending on the mixer); If it is not pressed, there is no attenuation. When we input microphone signals (such signals are usually several millivolts in size), we do not need to press the attenuation button; When we input line level signals (such as DVD, card holder, etc., the size of such signals is generally 100-200 MV), we must press the attenuation button.

Then adjust the gain adjustment knob to see if it is in the correct position. When the peak indicator light is on or always on, turn the knob 5-10 ° counterclockwise (a scale mark).

3. Do not use or misuse the parametric tone controller

Generally, the mixer is equipped with 3-segment or 4-segment parametric tone controller, which is composed of 6 or 8 knobs. These knobs are divided into two categories: one is gain control, marked with -10 ～ +10, and the other is frequency knob, which selects the frequency point to be increased or decreased according to the site needs. The adjustment of these knobs requires certain tuning experience. If you are not familiar with or lack tuning experience, remember not to adjust these knobs, especially the gain knob, which is generally at "0". However, we should also oppose it. In any case, if we do not use a parametric tone controller, it will not become a device?

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