Hannibal turns on the radio, an utterly mundane gesture; but because he is Hannibal, the slightest twist of the dials brings on a Brandenburg Concerto, calm and quiet.

The common preferences of the cops who used to inhabit this car mean that the sound favours the bass; with Bach, it means that the basso continuo will come to the foreground, increasing the soporific effect of the car's gentle motions.