“The swing era lasted barely a decade—roughly the mid-1930s until the end of World War II—but it was a golden age for jazz.
It was the only time that jazz dominated American popular music. Legendary musicians who had helped invent the music—the likes of Louis Armstrong, Billie Holiday, Benny Goodman, Count Basie, Teddy Wilson, Lester Young, Bunny Berigan and Coleman Hawkins—still were in their prime. And they could be heard everywhere: swank hotel ballrooms, homecoming dances on college campuses, radio programs—but especially at cramped, smoky nightclubs in such musical hotbeds as Chicago, Kansas City and New York City. In those clubs, jazz musicians honed their craft during lengthy jam sessions, where a player might improvise on chorus after chorus of standards like George Gershwin’s “I Got Rhythm,” or on their own compositions or blues riffs made up on the stand.
But the only people who got to hear their jazz heroes stretch out and work through new musical ideas in those impromptu blowing sessions were those sitting in the audience. In those days, technology limited recordings to a window of only about three minutes, the amount of music that could fit on 78 rpm records. The ability to record extended performances by the era’s jazz greats simply didn’t exist.”