Mike,
I am at home today so I don't have the WK2 to look at, but I really thought I could save single songs I record on upper track 1, upper track 2, Lower and the accomp. track as a Standard Midi File. I know I can do this on the WK6 and WK8 because I do it all the time. If I'm wrong, you would have to record the song out on a computer, save it onto a floppy disk as a smf file and then you could play it direct from disk. Now that I'm thinking about this, I remember the specs as being able to record songs on basically 4 tracks (upper 1,2 Lower and accomp) and playback 16 tracks from midi files. I'll varify this Monday at the store.
George Kaye