I have a video of a lacrosse game with a lot of clips. I want to adjust the audio volume for all the clips or by selecting multiple clips at the same time. How do you do this?
You can select all the clips and use the volume bar to adjust all audio by the same amount, or you could select all clips, open the mixer, and use the master volume fader which will give you more accuracy.
In addition to George's reply - you often get some variation in sound levels between clips - you can get them all to the same volume level then by using Normalise first - right click and select Audio functions, Normalise.
This will significantly reduce the variations in sound level between clips and then you can follow George's instructions.