Basic application knowledge of mixer in stage audio equipment.Marten Audio price

　　There are many ways to describe the mixer in the stage audio equipment. The most appropriate one is to regard the mixer as the heart of a sound system. The blood circulation of this heart directly affects the stability of the entire system. Blood is a liquid, and water is a liquid, and both are equally important. So what are the skills for the operation of the mixer?

　　1. The signal input of the mixer.

　　The input signal of the mixer is generally divided into two types: low-impedance microphone signal input and high-impedance line signal input. Each input can be regarded as a water pipe, that is, if a mixer has multiple signal inputs, it is like the water from multiple water pipes flows into the mixer for processing. The distinction between low resistance and high resistance can be seen as a difference in water pressure or flow velocity.

　　2. Adjust the channel gain of the mixer.

　　To input the audio source into the mixer, first of all, it is necessary to distinguish whether it is low-impedance or high-impedance, and then use a standard signal cable to correctly connect it to the mixer. If you want to achieve the perfect sound quality for each audio source, you need to adjust carefully. The gain of each input channel of the mixer is very important and critical, but many sound engineers seem to simply regard the gain as a volume knob, which is a big mistake. In fact, the gain is mainly used to control the dynamic range of the input signal. Generally, when the gain is adjusted to the maximum without distortion, it is the maximum effective dynamic range, and it is also the best effect state.

　　3. Adjustment of mixer channel equalization group.

　　After the gain is adjusted, generally the next step is to adjust the equalization group of the mixer channel. The order of adjustment should be to start from the bass part first, and then adjust the high-pitched part. Because only the basic sound of the sound is guaranteed, the good sound of multiple overtones can be guaranteed. Nowadays, the equalization group of professional mixers generally has frequency selection adjustment. For example, when playing disco music, you feel that the bass is not strong enough. You can choose the bass frequency of the equalization group of the channel where the disco music is located at about 200Hz. Then use the adjustment knob to make a moderate boost, so that the bass strength comes out. If the application is flexible, you can also use the frequency selection function of the equalization group to suppress the acoustic feedback. For example, there will be a formant around 300Hz in a general dance hall, and this frequency is often prone to acoustic feedback. The frequency of the microphone input channel can be selected around 300Hz. , and then use the adjustment knob to moderately attenuate, so that the acoustic feedback can be effectively reduced. Of course, the frequency of the acoustic feedback generated by each sound field is different, but no matter what frequency the acoustic feedback is, it can be easily controlled by this method. Of course, this needs to be flexibly controlled according to experience. And to perfectly adjust the sound field and avoid acoustic feedback, you need to use a professional multi-band equalizer or feedback suppressor to adjust.

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