What does the term ducking mean in audio processing?

Ducking in audio processing refers to the technique of reducing the level of one audio source to allow another audio source to become more prominent. This is commonly used in scenarios where speech needs to be clearer over background music or other ambient sounds. For example, in radio broadcasting, if a DJ speaks over music, ducking lowers the volume of the music while the DJ is speaking, ensuring that the voice is intelligible and the message is conveyed effectively.

The process typically involves using a compressor that detects when the primary audio source (like speech) is present and automatically lowers the volume of the background audio source (like music). This creates a more balanced mix, which enhances the listening experience. The technique is particularly important for maintaining clarity in environments with competing sounds.