I have noticed a difference in volumes in some RTs over the years. I figure it just has to do with what the mix at the studio. Some are quite softer than others. I usually deal with by creating custom styles and adjusting the volumes via the style editor. This way, I don't have to adjust the volume in each song.

Make sure you don't have volume changes via the spinners or Bar Settings. You may have to end up setting individual part volumes.

R