Charlie Barnet who plays himself, led his first band at age 16, on a transatlantic liner, and eventually made 22 such crossings; he also visited the South Seas and Latin America. In 1932 he became leader of the band at the Paramount Hotel in Manhattan, New York City, and thereafter formed a succession of large and small bands. He achieved his greatest fame with the recording of "Cherokee" (1939), his signature song, and with "Skyliner" (1944).
No credits for Afro American players and songwriters after all the film was about their music: jazz and blues.
Jackie Cooper was an accomplished musician in his own right, but on the drums, not the trumpet.
Unusually for the era, the film ends with a cut to black, rather than the then-normal fade-out.