I got a Q About a File type?

Ok so I got a WK-200 Digital Keyboard and I was wanting to put stuff I have on my keyboard onto my comp and so I did but the thing is its not a MIDI fie or anything it is a SP7 File so I'm wondering how can I just get it to import MP3 files or How can I make a SP7 file in a MP3 or WAV so I can listen to what I made?