The flattened fifth is a half-step down from one of Western music’s most stable, consonant intervals. It sounds sinister. Medieval theorists called it diabolus in musica (”the devil in music”) and banned it from sacred music. Dizzy Gillespie loved it.

The flattened fifth creates a moment of harmonic friction before resolving somewhere unexpected, and in the early 1940s, Harlem musicians including Gillespie and Charlie Parker were gathering after hours to build an entire music around exactly that kind of tension. They pushed jazz into bebop: faster, more complex, virtuosic, and improvisational. A sound built for listening. The flattened fifth was one of its signature tensions—the musical equivalent of the rug being pulled.

But bebop was hard to dance to, and Gillespie refused to make the false choice between experimentation and audience. “If you want to make a living at music, you’ve got to sell it,” he said. He continued to push beyond bebop with Afro-Cuban rhythms, helping to found Latin jazz. In the 1980s, he led the United Nations Orchestra, a big band drawn from musicians across the globe.

His bent trumpet was a happy accident that became his signature. In 1953, after a comedian accidentally sat on his horn, he had others built the same way. The 45-degree bell altered projection, throwing sound up and out rather than straight ahead. It fed the sound back to his own ears, and the horn became as much a part of his image as his puffed-out cheeks, beret, and horn-rimmed glasses.

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Special thanks to David McGee for suggesting Dizzy Gillespie's trumpet.

Links:

• Dizzy Gillespie’s Trumpet – National Museum of American History, Smithsonian Institution

  
  

• Dizzy Gillespie - Black Music Project

  
  

• “Dizzy Atmosphere: the Challenge of Bebop” - Eric Porter, American Music, Vol. 17, No. 4, 1999

  
  

• “Dizzy Gillespie, Blow Your (Bent) Horn” - Legacy, January 6, 2013

  
  

This post is part of The American 250, a series featuring 250 objects made by Americans, located in America, in honor of the country's 250th anniversary. 250 words on 250 works, from January 1 to December 31, 2026.

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