In southwestern Louisiana in the 1800s, the fiddle was the most popular Cajun instrument and the music still carried clear influences from the Poiteu region of France and the Scottish/Canadian influences of their earlier homeland. In the late 19th century German immigrants spreading outward from central and eastern Texas and New Orleans soon brought the accordion as well. Black American farmhands at the time sang a rhythmic type of work song called juré, which mixed with Cajun folk music to form la la, a central component of Creole music. La la was primarily rural, played at parties also known as la las, and found in towns in the prairie regions like Mamou, Eunice and Opelousas.
In 1901 (see 1901 in music), oil was discovered at Jennings and immigration boomed. Many of the newcomers were white businessmen from outside of Louisiana who attempted to force the Cajuns and other minorities to adopt the dominant American cultural forms, even outlawing the use of the French language in 1916. Despite the law, many Cajuns still spoke French at home, and musical performances were in French.
One of the most successful label owners was Floyd Soileau. Soileau started as a local DJ in Ville Platte, Louisiana in the mid 1950s, and soon decided he would rather help make music than play it. He started most of the labels listed in the previous paragraph. He and his record shop are important pieces of Louisiana's music history.
However, northern Louisiana's lasting contribution to the world of popular music was the radio program "The Louisiana Hayride", which started broadcasting in 1948 on KWKH in Shreveport. Hank Williams, George Jones, Elvis Presley and nearly every other country legend, or future country legend alive during the 1950s stepped on stage at the Shreveport Municipal Auditorium. They performed, many for the first time on radio, on a signal that covered much of the southeastern US. The original production of the show ended in 1960, but re-runs and the occasional special broadcast continued for a few years. The Louisiana Hayride was regarded as a stepping stone to The Grand Ole Opry, the legendary radio show from WSM in Nashville, Tennessee.
Northern Louisiana in the 1950s had a country rock scene, many of whose artists were recorded by local Ram Records. Later, Shreveport produced The Residents, Kenny Wayne Shepherd, Private Life featuring Danny Johnson, now a member of Steppenwolf (band), and Sunday Mass Murder.
In the 19th century there was already a mixture of French,Spanish, African and Afro-Caribbean music. The city had a great love for Opera; many operatic works had their first performances in the New World in New Orleans.
Caribbean dances known to have been imported to Louisiana include the calenda, congo, counjai and bamboula.
Louis Gottschalk was an early 19th century White Creole pianist and composer from New Orleans, the first American musician/composer to become famous in Europe. A number of his works incorporate rhythms and music he heard performed by African slaves.
In addition to the slave population, antebellum New Orleans also had a large population of "Free people of Color", mostly Creoles of mixed African and European heritage who worked as tradesmen. The more prosperous "Creoles" sent their children to be educated in France. They had their own dance bands, an opera company, and a symphony orchestra. The community produced such composers as Edmund Dede and Basil Bares. After the American Civil War many Creole musicians became music teachers, teaching the use of European instruments to the newly freed slaves and their descendants.
Probably the single most famous style of music to originate in the city was New Orleans jazz, also known as Dixieland. It came in to being around 1900. Many with memories of the time say that the most important figure in the formation of the music was Buddy Bolden. Early rural blues, ragtime, and marching band music were combined with collective improvisation to create this new style of music. At first the music was known by various names such as "hot music" "hot ragtime" and "ratty music"; the term "jazz" (early on often spelled "jass") did not become common until the 1910s. The early style was exemplified by the bands of such musicians as Freddie Keppard, Jelly Roll Morton, "King" Joe Oliver, Kid Ory, and Papa Jack Laine. The next generation took the young art form into more daring and sophisticated directions, with such creative musical virtuosos as Louis Armstrong, Sidney Bechet, and Red Allen.
New Orleans was a regional Tin Pan Alley music composing and publishing center through the 1920s, and was also an important center of ragtime.
The city also has a rich tradition of gospel music and spirituals; Mahalia Jackson was the most famous of New Orleans' gospel singers.
In the 1950s New Orleans again influenced the national music scene as a center in the development of Rhythm & Blues. Important artists included Fats Domino Snooks Eaglin Dave Bartholomew, Professor Longhair.
1980s new style of "street beat" brass bands combining the jazz brass band tradition with funk and hip hop was spearheaded by the Dirty Dozen Brass Band (which had more of a bebop influence than many of the later bands), then the Rebirth Brass Band.
Contemporary jazz has had a following in New Orleans with musicians such as Alvin Batiste and Ellis Marsalis. Some younger jazz virtuosos such as Wynton Marsalis and Nicholas Payton experiment with the avant garde while refusing to disregard the traditions of early jazz.
Continuing development of the traditional New Orleans jazz style, Tom McDermott, Evan Christopher, New Orleans Nightcrawlers Louisiana blues created a specialized form of blues music sometimes using zydeco instrumentation and slow, tense rhythms that is closely related to New Orleans blues and swamp blues from Baton Rouge.
Significant New Orleans rock & roll bands include Zebra (band), The Meters, The Radiators, Galactic, Better Than Ezra,12 Stones, and Cowboy Mouth.
Beginning in the mid 1990s, New Orleans became a hub of Southern rap. First with rapper Master P (The Ghetto Is Trying to Kill Me!) and his No Limit click based out of the 3rd Ward, then later came the Cash Money click who popularized a unique semi-melodic Louisianian style of rapping to the Hip Hop mainstream.
Louisiana is known as the most important place for the development of a style of heavy metal: sludge metal. Two of its founding acts, Eyehategod and Crowbar, are from New Orleans, where the genre's most important scene can be found. Other notable sludge metal bands such as Acid Bath, Down, and Soilent Green hail from Louisiana.