[Zubersoft]

It depends how you want to go about it. If you just long press the song on the library screen, tap Share->Export files and select a destination, you can get a copy of the PDF that is used. You can then put the .csv in the same directory as that PDF and then use Import->CSV or PDF Bookmarks to extract individual songs from that PDF. There isn't a way to apply a csv to an existing PDF used by a song in the library though.

Mike