Individually put some frequently listened music files in a folder and then play them, this is the conventional way of playing songs on your hard disk. But if these music files distributes in multiple folders, then it needs us to enter into these directories to play. Moreover, in this playing process, it is always impossible to play according to the sequences of track title, file bit rate (i.e. the quality of music files), album title and so on. This brings user a lot of inconvenience in deed...

If you don't understand what is the hash value of a file, then, i don't think you have to study this application, because maybe you do not need to use it or even know it at all.