In audio processing, what is the purpose of a compressor?

The purpose of a compressor in audio processing is to reduce the dynamic range of audio signals. This means that it decreases the volume of the loudest parts of the audio while boosting the quieter parts, creating a more balanced sound. By compressing the dynamic range, there is a smoother transition between soft and loud elements, which helps prevent distortion and allows for a more consistent listening experience. This is particularly useful in music production, broadcasting, and live sound reinforcement, where fluctuations in volume can be jarring to the listener.

Increasing overall volume, adding reverb effects, and equalizing frequencies are tasks handled by different audio processing tools, such as limiters/boosters, reverb units, and equalizers, respectively. Each of these has its specific function in the realm of audio engineering, distinct from the role of a compressor.