iTunes will show duplicate tracks in your iTunes Library (File / Display Duplicates in the Menu Bar.) but offers no help in removing them other than to do it manually.
Dupin steps up to the plate with a three step processes:
- You set the criteria of what is a duplicate track. Song title often isn't enough. Artists can have multiple versions of their songs on different albums. (Studio, Live, Acoustic, Remix, etc). I also collect covers of songs so I might have 5 or more versions of the same song by different artists. Dupin Lite lets you set duplicate criteria to be Name, Artist, Album, Time, Size, Kind and more. Once you set the criteria, Dupin Lite reads through your iTiunes Library and makes a list of all the duplicates.
- Next, you have to choose one of the duplicates to be the "keeper". Duplin Lite lets you choose the keeper based on criteria like Newest Added, Oldest Added, Highest Bit Rate, Lowest Bit Rate, Kind and more. Once you select your criteria, Dupin Lite goes through the list of duplicates and find the one keeper for each set of duplicates. You can review this list and do a bit of manual cleanup if you need to.
- The last step is Purge. Dupin Lite removes the tracks in each set of duplicates that isn't the keeper. Purged tracks go into the Trash so you can get them back if you realize that you've removed a the wrong file.