Is your world developed enough to have radio so music reaches people that way? Alternatively do your characters go to concerts and how easy is it for them to get to these? Are the orchestras state sponsored and deliberately sent out by your government to entertain the masses to ensure there are no political protests and so on?
Can the musicians play whatever they like or do they have to stick to a repetoire? What are the consequences if they do not do this? There should be some good story ideas here!