Presented in an iTunes-like interface, Dupin seeks out duplicate files in your entire iTunes library or within specific areas—Music, Movies, and TV Shows among them. Unlike with iTunes, you can search for files using a variety of criteria including Name, Artist, Album, Time, Size, Track Number, Disk Number, Sample Rate, Bit Rate, and Kind. You can choose multiple criteria—Name, Artist, Album, and Time, for example. Click Get Dupes and you're presented with a list of duplicates.
Once you have that list, click a Filter button and then choose the factor you'll use to identify the "keepers." This can be Oldest Date Added, Highest Bit Rate, Largest File Size, and so on. You can also choose to always keep a particular kind of file—Apple Lossless or AAC files, for instance. Within this Dupin Filter Controls window you can choose to automatically delete any tracks that don't match the filter. Or, you can allow Dupin to do its job and then purge your duplicate tracks.
I conducted a couple of searches using a variety of factors and eventually settled on searching by Name, Artist, Album, and Time. I then chose to filter by Highest Bit Rate as well as always keep Apple Lossless files. When I finished, I purged the duplicates in order to get them out of my iTunes library, but then retrieved them from the Trash and placed them in a Duplicates folder that I created. I probably didn't need to as I had copies on my Macs, but should I miss something that was inadvertently deleted I reckoned it would be easier to locate it in this folder, which I could later archive or throw out.
Making it available
My media library was finally in decent shape. It was now time to put it in a place where I could easily access it from any computer. I chose to do this via a Network Attached Storage (NAS) device. Specifically, I purchased Synology's DS111 (around $200 retail) and filled its single bay with a fast 2TB hard drive. I chose the DS111 after reading a variety of positive reviews. I wanted a NAS that supported gigabit ethernet, which this one does. I also wanted a flexible NAS, and it is. You can use the thing to perform a variety of jobs including setting it up as a Web, FTP, mail, and media server—all controlled through a browser interface.
Installing the hard drive was a snap—completed in about two minutes. Setup was likewise simple enough once I downloaded the most recent Synology tools. Leaving its more advanced features for later, I set about moving my media to it.