Clean up “Artist - Song Name"-Style Titles 
Split song names of the form “The Beatles - Can’t Buy Me Love” into separate artist and song names.
Sometimes, you’ll encounter a Song Name in iTunes that
incorporates the Artist as well as the Song Name of the track, typically
like this: “The Beatles - Can’t Buy Me Love.” I don’t care too much for
this arrangement, but I ran into it so often that I wrote a script that
removes the Artist portion to the track’s artisttag and fixes what’s left in the
nametag.
The Code
This script acts on the selected tracks. If their Song Names
contain a hyphen flanked by a space on either side ( - ), the script
splits the text on either side of the those three characters, placing
the first part in the artisttag and
the second part in the nametag:
property separator : " - "
tell application "iTunes"
if selection is not {} then
repeat with aTrack in selection
tell aTrack
if name contains separator then
set {artist, name} to my text_to_list(name, separator)
end if
end tell
end repeat
end if
end tell
on text_to_list(txt, delim)
set saveD to AppleScript's text item delimiters
try
set AppleScript's text item delimiters to {delim}
set theList to every text item of txt
on error errStr number errNum
set AppleScript's text item delimiters to saveD
error errStr number errNum
end try
set AppleScript's text item delimiters to saveD
return (theList)
end text_to_listThis script ...