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.
Humble Pie was released to coincide with the album and failed to chart, however the band was becoming known for popular live rock shows in the US. On July 9, 1971, Humble Pie opened for Grand Funk Railroad at their historical Shea Stadium concert, an event that broke the Beatles record for fastest selling stadium concert, to that date. Also in 1971 Humble Pie released their most successful record to date "Rock On" as well as a live album recorded at the Fillmore East in New York entitled "Performance Rockin' the Fillmore". The live album reached No. 21 on the US "Billboard"