A big band is a type of musical ensemble associated with jazz and the Swing Era typically consisting of rhythm, brass, and woodwind instruments totaling approximately twelve to twenty-five musicians. The terms jazz band, jazz ensemble, jazz orchestra, stage band, society band, and dance band may describe this type of ensemble in particular contexts.

A standard 17-piece instrumentation evolved in the big-bands, for which many commercial arrangements are available. This instrumentation consists of five saxophones (most often two altos, two tenors, and one baritone), four trumpets, four trombones (often including one bass trombone) and a four-piece rhythm section (composed of drums, acoustic bass or electric bass, piano and guitar).

However, variants to this instrumentation are common. Composers, arrangers, and bandleaders have used sections with more or fewer players, and additional instruments, such as valve trombone, baritone horn/euphonium (both of which are usually used in place of or with trombones), vibes, bass clarinet, French horn, tuba, banjo, accordion and strings (violin, viola, cello). Male and female vocalists have also joined big bands to perform particular arrangements. In recent years synthesizers and / or electronic keyboards have been added, often replacing the piano.

John Birks "Dizzy" Gillespie ( /ɡɨˈlɛspi/; October 21, 1917 – January 6, 1993) was an American jazz trumpeter, bandleader, composer and, occasionally, singer.

Allmusic's Scott Yanow wrote, "Dizzy Gillespie's contributions to jazz were huge. One of the greatest jazz trumpeters of all time (some would say the best), Gillespie was such a complex player that his contemporaries ended up copying Miles Davis and Fats Navarro instead, and it was not until Jon Faddis's emergence in the 1970s that Dizzy's style was successfully recreated . . . Arguably Gillespie is remembered, by both critics and fans alike, as one of the greatest jazz trumpeters of all time."

Gillespie was a trumpet virtuoso and improviser, building on the virtuoso style of Roy Eldridge but adding layers of harmonic complexity previously unknown in jazz. His beret and horn-rimmed spectacles, his scat singing, his bent horn, pouched cheeks and his light-hearted personality were essential in popularizing bebop.

In the 1940s Gillespie, together with Charlie Parker, became a major figure in the development of bebop and modern jazz. He taught and influenced many other musicians, including trumpeters Miles Davis, Fats Navarro, Clifford Brown, Arturo Sandoval, Lee Morgan, Jon Faddis and Chuck Mangione.

Ray Charles Robinson (September 23, 1930 – June 10, 2004), known by his shortened stage name Ray Charles, was an American musician. He was a pioneer in the genre of soul music during the 1950s by fusing rhythm and blues, gospel, and blues styles into his early recordings with Atlantic Records. He also helped racially integrate country and pop music during the 1960s with his crossover success on ABC Records, most notably with his Modern Sounds albums. While with ABC, Charles became one of the first African-American musicians to be given artistic control by a mainstream record company.Frank Sinatra called Charles “the only true genius in show business.”

The influences upon his music were mainly jazz, blues, rhythm and blues and country artists of the day such as Art Tatum, Nat King Cole, Louis Jordan, Charles Brown, Louis Armstrong. His playing reflected influences from country blues and barrelhouse, and stride piano styles.

Rolling Stone ranked Charles number ten on their list of "100 Greatest Artists of All Time" in 2004, and number two on their November 2008 list of "100 Greatest Singers of All Time". In honoring Charles, Billy Joel noted: "This may sound like sacrilege, but I think Ray Charles was more important than Elvis Presley. I don't know if Ray was the architect of rock & roll, but he was certainly the first guy to do a lot of things . . . Who the hell ever put so many styles together and made it work?"