If you're listening to the concert right now, this haunting song you're hearing is Francisco's Cantan. I was backstage earlier and F and the musicians were talking about how hard it was to find musicians who could accompany the chorus for this piece, because it's so difficult. But you wouldn't know, would you, by listening to Cantare -- they make it sound so effortless. Next up: Stephen Hatfield's rousing Tjak! (you can feel the entire hall jumping!) and the all time classic What a Wonderful World.