Complete with Pabst-clutching roadies on the sleeve, the Allman Brothers’ At Fillmore East might be a double-LP from blues-rock central casting were it not for the soaring jams on sides B, C and D. Recorded at Bill Graham’s East Village venue in March 1971 and released four months later, it is the last Allman Brothers album under the stewardship of Brother Duane, whose conversational, Coltrane-influenced guitar provides transformative grace on a 23-minute “Whipping Post” and points the way beyond longhaired blues noodles. “It’s like what B.B. King did on Live at the Regal, which is just like one big long song, a giant medley,” Gregg Allman told band biographer Alan Paul. “He never stopped. He just slammed it.” On the flipside is a portrait of an absent road manager Twiggs Lyndon Jr., then incarcerated for stabbing a Buffalo club-owner over unpaid proceeds. Jesse Jarnow