Preservation Hall Jazz Band, Hector Rosado and Christine Havrilla, 7 p.m. Aug. 7, Wind Creek Steel Stage at PNC Plaza, SteelStacks, Musikfest. Gates open at 6 p.m. The Preservation Hall Jazz Band has held the torch of New Orleans music aloft for more than 50 years. While standards and traditional New Orleans jazz repertoire remain its core focus, it has transformed into a vibrantly cross-pollinated ambassador for the city, exploring original compositions and Afro-Cuban rhythms, while collaborating with artists beyond the jazz spectrum.