: The lush, slow middle theme (famously used for years in United Airlines commercials). Impact and Controversy

Gershwin was initially reluctant to take on the challenge, reportedly only starting work after reading a news report that Whiteman was already planning the performance.

: Due to time constraints—Gershwin composed the concerto in just five weeks—the orchestration was handled by Whiteman’s arranger, Ferde Grofé . Grofé created multiple versions over the years, including the original jazz band scoring (1924) and the more common full symphonic version (1942). Musical Structure and Themes

: Representing the mechanical, rhythmic pulse of 1920s urban life. Stride : A nod to the Harlem stride piano style. Shuffle : A jazz-inflected rhythmic section.