Volume reduction

The Volume reduction command from the audio object context menu automatically dampens the volume for the length of the audio object on all other tracks. The volume on the track of the selected object thus remains unchanged.

Only original sound: Here you can also specify whether you want to dampen only the original sound of the video or all audio tracks.

Transition length: In the dialog you can set the dampening and the length of the fade in and out. You can use this command while recording audio (Audio recording, advanced options).