For my upcoming 26 hour road trip to California, I have created 12 CDs, all at almost exactly 80 minutes each. They are contained in a playlist group. If I view the group, I notice that exact duplicates are automatically removed. How can I check to see if any of the playlists in this group have duplicates? I obviously don't want to waste space with a duplicate. Of course I'm 99% sure there are no duplicates but I want to know.