"Man, if you have to ask what it [jazz] is, you'll never know." ― Louis Armstrong From Louis Armstrong Trumpeter Added on 1/31/2026 About Louis Armstrong American trumpeter and vocalist who was a foundational figure in jazz. His influential recordings and performances helped shape 20th-century popular music. Born: 1901-08-04 Died: 1971-07-06 View all quotes from Louis Armstrong