A file that contains an index to a selected group of music files on the computer. Using media player software such as iTunes and Winamp, playlists are created by the user by dragging and dropping titles from a master index. The software may be able to create a playlist automatically. For example, iTunes has a Smart Playlist feature that will automatically create a playlist with a selected maximum number of titles based on any number of criteria such as genre, artist and year.|
There are several file formats used for playlists. For example, iTunes defines playlists in its XML-based library file, which also holds song information. Some formats are simple text files with a song on each line; for example, M3U files (MP3 playlists) contain a list of URLs or local file names, while RAM files contain a list of URLs to RealAudio files. The PLS playlist defines its song titles as key-value pairs in the Windows INI format (see INI file). Windows Media provides several playlist formats (see Windows Media formats). See media player and MPV.