A small group of young instrumentalists plays an intricate piece with a familiar melody. A voice sounds out from somewhere – it’s a tenor on a balcony across the square. Others intone in harmony, growing in strength. A sheet of paper is distributed in the crowd waiting to enter St. Thomas’ Church for the opening of the Bachfest so that more can join in. The square is subverted with music under the imperious gaze of JSB. No law enforcement or security forces are called in.