调音台是音响链的核心，这是一种有若干路相同输入单元，能同时接受多路信号的集放大、处理、混合、分配为一身的音频处理器材，这里仅粗略地介绍一下它的作用。
The mixer is the core of the sound chain. It is an audio processing equipment with several identical input units that can simultaneously receive multiple signals, including amplification, processing, mixing and distribution. Here is only a rough introduction to its role.
(1)、放大：是将各种不同的信号按需要进行放大，使其达到一定的电平值。
(1) Amplification: it is to amplify various signals as required to reach a certain level value.
(2)、处理：主要是对各种信号按需要进行比例调节和频率均衡，即对各种信号的强弱和高、中、低音进行调节，使总的节目听起来均衡悦耳。
(2) Processing: it is mainly to adjust the proportion and frequency balance of various signals as required, that is, to adjust the strength and high, medium and low tones of various signals, so that the overall program sounds balanced and pleasant.
(3)、混合：是将多路信号混合成一路或两路，信号输出一般要求音响的配置以两声道的形式为标准形式。
(3) Mixing: it is to mix multiple signals into one or two channels. Generally, the sound configuration is required to take the form of two channels as the standard form for signal output.
(4)、分配：在普通的扩音系统中，主要是按需要把未经混合的某一路或几路信号取一部分送入别的音频处理器材进行处理，或者将已混合的信号分出一路或几路作其它用。(例如录音、返听、辅助、监听)
(4) Distribution: in the ordinary public address system, it is mainly to take part of the unmixed one or several signals and send them to other audio processing equipment for processing, or divide the mixed signals into one or several channels for other purposes. (such as recording, listening back, assistance, monitoring)
此外
山东音响是音响链的后一个环节，它是一个换能设备，将电信号转变成扬声器振膜的振动，从而使人耳听到响亮的声音。
In addition, Shandong professional audio is the last link of the audio chain. It is an energy conversion device that converts the electrical signal into the vibration of the loudspeaker diaphragm, so that people can hear a loud sound.
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