Recorded primarily for OKeh Records, this era features the and Hot Seven sessions. These tracks moved jazz from a group-improvised music to a soloist's art form. 2. The Swing and Big Band Era (1930s–1940s)
In the final decade of his life, Armstrong achieved his greatest commercial triumphs, famously knocking The Beatles off the top of the Billboard charts in 1964. "What a Wonderful World," "Hello, Dolly!"
He moved the focus from group improvisation to individual brilliance.