Descript's Detach audio feature lets you edit a video’s audio track without creating breaks in the video Timeline.

• If you use detach audio on a video track from within the Sequence Editor, this will create two tracks in the sequence: one for the video layer and another for the audio layer.
• If you use detach audio on a video layer in your composition's Timeline, this will create a new sequence with two tracks: one for the video layer and another serving as the audio layer.

Edits can then be performed independently on each track without affecting the other.