Among the residents of Treme, David Simon’s HBO drama series about the inhabitants of New Orleans in the wake of Hurricane Katrina, you’ll find a character called Delmond. Delmond, a talented jazz trumpeter, is a deeply conflicted individual. In the person of his father, he is tied to the ruined city, its historic music and its obscure ritual cultures. And yet, he is drawn to the East coast, where the ensemble in which he plays is in considerable demand.