调音台（也叫混音器、混音台等），是一种在专业音频领域中使用的用来对音频信号进行混合（即混音），路由，调节音量、音色、动态范围等的电子设备。依型号不同，调音台可用于模拟信号、数字信号。最后调整好的信号（电平或数字采样）合到一起成为合成的输出信号。

调音台应用到了很多地方，比如录音棚、公共广播系统、扩声系统、广播、电视以及电影后期制作等等。例如这样简单的应用场景：来自两个话筒的声音（比如二重唱），需要从同一套扬声系统中同时听到。在用于现场演出的时候，除非特定的调音台自带功率放大功能或者连接到有源音箱，否则调音台所处理产生的信号一般是直接送到功率放大器的。在各种现场表演的盗录中，质量最高的必然源自调音台对扬声系统的输出信号，即所谓调音台内录。

In audio, a mixing console (also known as an audio mixer, mixing desk or sound mixer) is an electronic device for combining (also called "mixing"), routing, and changing the level, timbre (tone color) and/or dynamics of many different audio signals, such as microphones being used by singers, mics picking up acoustic instruments such as drums or saxophones, or signals from electric or electronic instruments such as the electric bass or synthesizer. In the 2010s, a mixer is able to control analog or digital signals, depending on the type of mixer. The modified signals (voltages or digital samples) are summed to produce the combined output signals, which are then broadcast, amplified through a sound reinforcement system or recorded (or some combination of these applications).