Joshua's proposal was effective. The Duke of Bones actually accepted his request happily as Joshua turned from an uncouth intruder to a noble guest who came to listen to his performance.
It was just that, for a human, the live experience of this concerto... would be a bit creepy.
There was a dedicated auditorium in the castle where the Duke of Bones used for his performances. The room was replete with instruments from a piano to violins, and they could be used by an orchestra to perform grand classical music.
Some of the musicians were skeletons, while another part consisted of living corpses with meat still hanging off their rotten body.
All of them were dressed up like 19th-century Victorian English gentlemen, and their outfits made them look very elegant as they picked their instruments up.