調音臺是音響鏈的核心，這是一種有若干路相同輸入單元，能同時接受多路信號的集放大、處理、混合、分配為一身的音頻處理器材，這里僅粗略地介紹一下它的作用。
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：是將各種不同的信號按需要進行放大，使其達到一定的電平值。
(1) Amplification: it is to amplify various signals as required to reach a certain level value.
(2)、處理：主要是對各種信號按需要進行比例調節和頻率均衡，即對各種信號的強弱和高、中、低音進行調節，使總的節目聽起來均衡悅耳。
(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：是將多路信號混合成一路或兩路，信號輸出一般要求音響的配置以兩聲道的形式為標準形式。
(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：在普通的擴音系統中，主要是按需要把未經混合的某一路或幾路信號取一部分送入別的音頻處理器材進行處理，或者將已混合的信號分出一路或幾路作其它用。(例如錄音、返聽、輔助、監聽)
(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
山東音響是音響鏈的后一個環節，它是一個換能設備，將電信號轉變成揚聲器振膜的振動，從而使人耳聽到響亮的聲音。
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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