When you use TouchCopy to copy iPod songs which are already in your iTunes library, a duplicate copy will NOT be created.TouchCopy will check to see if a song already exists in your iTunes library before copying it from your iPod, iPhone or iPad.
If you are copying a playlist from your iPod to iTunes, TouchCopy will copy the music listed in the playlist, if it does not already exist in iTunes. However, if the music listed in the playlist is already available in your iTunes library, TouchCopy will not create duplicates of the tracks, it will simply create a link from the playlist entry to the existing song.
You can use TouchCopy to find out which songs on your iPod are not also available in your iTunes library. To find this list, click the "Not in iTunes" header in TouchCopy. You can click "Copy to iTunes" from this list, as opposed to copying your entire list of iPod music, to save you time!
Occasionally, you may find that you have more than one copy of the same song or album in iTunes. Duplicates can appear for a number of reasons, including manually inputting songs into the library from a PC or merging multiple libraries together. This can leave your library looking messy, and you’ll duplicate these tracks more often than you should when shuffle-playing your songs.
If for some reason you have duplicate music in your iTunes library, go to iTunes > File > Show Duplicates. This will allow you to quickly find duplicate tracks. You can then delete these in iTunes by selecting the entries which you would like to delete, right-click, then hit "Delete from library".
Deleting duplicates tracks in iTunes is easy if there are only a couple of instances. However, what if you have loads of duplicates entries in your iTunes library? If this is the case, and you want to save yourself lots of time, try Tune Sweeper.
Tune Sweeper will scan your iTunes library, return a list of duplicates and even pick and remove the tracks which you don't want. Tune Sweeper can do this automatically, allowing you to keep either the newest or oldest files, based on your preference. With Tune Sweeper, you can even set search preferences, allowing you to find duplicates by comparing Song Title, Artist, Album and more.Download Tune Sweeper Now