For anyone interested in learning harmonica there used to be a shareware program called HARPING. It has its own selection of tuition tunes with some good satisfying songs like Love Me Do, or you can import any MIDI file of your choice. It gives a display of which holes to suck or blow and where you could 'bend' notes. Best of all it allows you to substiute a harp in another key to try the whole gamut of cross-harp styles.

From memory it focussed on the standard diatonic harp, not chromatic harmonica.

I don't know whether it's still available at shareware sites - if not let me know and I'll mail you the software. Regards, John