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 Betts and Allman trade long guitar solos, with one of Betts' solos quoting what would later become the main theme for the song "Les Brers in A Minor," as featured on the band's 1972 album "Eat a Peach". The song closes with "long, sustained notes" from Allman opposite Trucks' kettledrum. Applause concludes the album and the song fades out. During the fadeout, Trucks begins playing the tympani intro to "Mountain Jam" which would not be released in its entirety until its inclusion on "Eat a Peach". The band devised the cover idea for "At Fillmore East" rather than leaving it