Volume
Each song can have it's own Volume such that, when the song is played, it automatically sets the volume. To show the Volume meta data, context-click on the sort column headers, then pick "Volume" from the list. Now you can see the volume associated with each song. To set a volume for a song, enter a value between zero and one in the Volume column. Then when the song is playing, the volume knob will set the volume for that song.