The name that iTunes uses when sorting by composer.
- macOS 10.13+
If, for example, a media items's composer is "Ludwig van Beethoven" and the sort composer is "Beethoven Ludwig van", when iTunes sorts media items by composer, this media item would be grouped with other media items whose composers begin with "B".
If no sort composer is specified, this property is
nil and iTunes uses the value of the composer property when it sorts media items by composer.