Ducking

Ducking allows you to attenuate the level of an audio track so that the audio on another track is more prominent when both tracks are played back simultaneously.

A very common use case for ducking is the creation of two separate tracks, one for music and one for a voice-over, with the goal of the spoken content being accompanied by music on playback. With ducking applied, when the voice-over starts, the level of the music track is lowered by automatically created level envelope curves, so that the spoken content is perceived as in the foreground and the music in the background by the audience.

In this context, the track containing the music is called the carrier track. The track containing the voice recording is called the modulator track.

You can select multiple voice tracks as modulator tracks for a carrier track. You can also apply ducking to modulator tracks; for example, to give one voice track priority over another.