You can add the video track, the audio track,
or both tracks of a clip to a sequence. When you drag a clip from
the Project panel, you automatically add both tracks. If you want
to add only one track, add it from the Source Monitor.
Open
a clip in the Source Monitor.
In
the Source Monitor, click the Take Video/Take Audio button until
it displays the appropriate icon:
Take Video And Audio
Includes both video and audio tracks in the sequence.
Take Video
Includes video only in the sequence.
Take Audio
Includes audio only in the sequence.
Note: Specifying
a source track affects a clip only while adding it to a sequence.
It doesn’t change the state of clips or their source media.