I know that the objection will be raised that the piece is being played prestissimo. This is one of the points of contention between partisans of period instrumentation and performance, and the skeptics, as some scholarly evidence suggests that pre-romantic tempos were faster. Nevertheless, the performance seems a good one, and the Allegro of Bach's fifth Brandenburg Concerto features what may be the first cadenza in the keyboard repertoire. To this day, twenty years after first hearing it, it enchants me; it retains the capacity to startle and delight with its inventiveness and novelty. It was, perhaps, a small thing in its time, but it was far in advance of that time.