Goofaholix, When we practice the U Ba Khin method, the same mental faculty that is developed in Anapana Sati is brought to "Vipasana". The focus is sometimes narrow (like focusing on the soles of the feet) and sometimes it is widened to take in the whole body etc.. Sometimes it is fairly active and sometimes more passive but it is still the same mental faculty.
When I said "How about focusing directly on the sound of the chanting as it resonates
?" what do you think I meant?