To add an existing MIDI SMF file, use the following procedure.
- Connect the device you're using to a Mac/PC.
- Start iTunes on the Mac/PC.
- In the upper tabs of iTunes, choose "iPad."
- In the upper tabs, choose "Apps."
- Scroll down, and choose "KORG Module" from the apps below file sharing.
- Drag your MIDI SMF file to "KORG Module document."
This works great. It works for other apps too.
https://soundcloud.com/john-gury/king-porter-stomp
http://johngury.tumblr.com/post/104137760797/scott-joplin-maple-leaf-rag-korg-module-honky
Crikey!