More information on this subject can be found at the Developer section of www.riocar.org.

I checked there first but it still left me wondering how to actually check to see if a song is actually on the player twice if there is any duplicates since FID column gives a different FID even if a song is in there twice. Since the 'all tracks' view can't tell you in what particular playlist a song is referenced but rather how many times it is referenced. I guess it is a wish for me that 'all tracks could tell you in what playlist the original song is located & it's copies in others. Maybe I have too many copies of a song in other playlists a majority of my songs have as many as 10-11 'refs'.