Matching volume levels

[Weeination]

I included this text in another topic of mine "Audio out of sync" but I thought I would also make a new topic for these questions. This is in reference to my project with dozens of video clips.


The clips have varying volume levels. I split the audio on the ones that were not as loud and used the Amplify audio filter. After I did that, I noticed that there is also a Clip volume scale to increase the volume. I doesn't give you the ability to increase the volume as much as the Amplify filter. Should I be using the Clip volume feature first and then if after setting it at the maximum level, then use the Amplify filter to increase the volume any further if needed? I ask because I wonder if the integrity of the audio is in any way affected by using the Amplify filter too much.

Also, in order the get the volume levels to match, I was just simply playing them one after another and adjusting the Amplify setting accordingly. It's a little difficult to get the clips to exactly match in volume level, but I have them a lot closer to each other than before. Is there any way to precisely measure the volume levels in order to make it easier to get them to match up more closely?