[Zubersoft]

When I refer to songs, I mean the songs in MobileSheetsPro. A song is a container for one or more files and has metadata such as Artists, Albums, Genres, Keys, etc. The song is what you load to view the files. I don't much about the KORG PA300, as I've never used one and don't own one. Hopefully either another user here can provide feedback or you can contact KORG themselves for help. It's possible there is a firmware update you might need to install. Have you checked for that yet? 

I do know there are a lot of KORG users, and KORG worked with me to develop and test the features, so it's just a matter of figuring out how to configure your particular model keyboard.

Mike