This applet will assist with swapping, copying, and appending data between two user-chosen tags in selected tracks or tracks in the selected playlist:
Swap - swap data between tags, ex: ARTIST<->COMPOSER
Copy - copy data from one to another tag, ex: ARTIST->
Append - append data from one tag to the end of another, ex: ARTIST->COMPOSER - ARTIST
Prepend - prepend data from one tag to the beginning of another, ex: ARTIST->ARTIST - COMPOSER
The latter three actions also provide an option to delete the info from the first tag after the copy. Read Me explains all.
For OS X 10.8 or later only. This update is free for registered users of v4.x.
Select the Action to perform between the two chosen tags in each selected track.
Add or subtract a user-entered number from each selected track's Plays
Drag-and-drop to convert audio files with iTunes
Import CD tracks using any encoder on the fly
Change the iTunes "done" chime to a System sound, no sound, or your choice of an AIFF sound file
Set the Plays of selected tracks.
Convert selected tracks and export the converted files to a new folder