At Fillmore East jazz. "Fusion is a term that came later, but if you wanted to look at a fusion album, it would be "Fillmore East". Here was a rock 'n' roll band playing blues in the jazz vernacular. And they tore the place up," said Dowd. Announcer Michael Ahern opens "At Fillmore East" with a simple introduction: "Okay, the Allman Brothers Band." Duane Allman biographer Randy Poe describes it as "the only low-key moment over the course of the [show]." The cover of Blind Willie McTell's "Statesboro Blues" which opens the set showcases Duane Allman's slide guitar work in open E tuning.
At Fillmore East Phil Walden explained to executives that the band were less of a studio band and that live performances were most important to them. In all, the album featured seven songs spread over four vinyl sides. The album received strong initial sales. While previous albums by the band had taken months to hit the charts (often near the bottom of the top 200), the record started to climb the charts after a matter of days. "At Fillmore East" peaked at number thirteen on "Billboard" Top Pop Albums chart, and was certified gold by the Recording Industry Association of America that October.