Do you mean you have more than one audio track and you're trying to lower the volume on, say, your music while your narration plays?
That's fairly easy.
If you mean you've got a video you've shot with a noisy background and you can't hear the dialog, it's nearly impossible to lower the background noise and raise the volume of the dialog.
I imported a soundtrack purchased from Smartsound which shows as a single clip for the entire duration of the video. There is one video clip (only) where I need the sound attached to the video clip to be heard, but not from increasing the volume of that but by reducing the volume of the imported soundtrack for the duration of that particular video clip. There seems no way to "get at" the Smartsound track except as a whole. Thanks.
Just reduce the volume level on the music clip by dragging the horizontal line that runs horizontally through the clip down.
To raise and lower the volume at specific points, place keyframe points along this horizontal line.
I figured this out for the audio attached to the video clips, but the soundtrack clip (in Audio 2) doesn't have the yellow line. It is just a long green rectangle with nothing in it other than the soundtrack title.
If the audio track is closed, open it by toggling the arrow switch on the Track Header to the left of the track.
Once it is open, you will see the yellow line.
Much of this is covered in my books, by the way, if you're interested.
Thanks, that worked. I'll buy your book!
Thats an easy step that Steve has told you.
More properties are available when you click on Properties button. (just below the monitor, when you will mouse hover, you will find it). Apart from sound volume, you can see more properties of the clips from there.