Mac, me and Mozart: a continuing 4-hand journey

I haven't mastered the split screen on iMovie 11, but I decided to aim my camcorder at Mac and Steinway to get the same effect. Basically I recorded Primo first and on playback added Secondo to Mozart's final 4-hand movement, Sonata 1, K.318-Allegro Molto. Needless to say, it's valuable to learn both parts when contemplating…