Apple has filed for a patent covering its iTunes Producer application, which is used by record companies and artists to encode and send music to the iTunes Music Store. “The patent includes screenshots of the application, which Apple only distributes to authorized musicians and record labels,” reports “One screenshot includes some interesting fields, such as Parental Advisory warnings, BPM, and various sales and copyright information. There’s a button for adding Lyrics, which may indicate future support for lyric searching in iTunes Music Store.”