Final answer:
By the late 19th century, the main emphasis of musical interest in NOLA had shifted from Opera and classical music to popular band music, specifically jazz. Jazz became immensely popular among urbanites in the 1920s and featured a unique style with improvised solos and a bold rhythm and harmony.
Step-by-step explanation:
By the late 19th century, the main emphasis of musical interest in New Orleans (NOLA) had shifted from Opera and classical music to popular band music, specifically jazz.
In the 1920s, jazz bands such as the King and Carter Jazzing Orchestra became immensely popular among urbanites, attracting large audiences, including young and white flappers and sheiks.
Jazz was a new style of music that featured an up-tempo beat, improvised solos, and a bold rhythm and harmony. It emerged from the fusion of different musical traditions such as blues, ragtime, and African American spirituals.