If truth be told, the Allman Brothers Band have always been the quintessential American rock band, shaping a rootsy mix of blues, jazz, country, and rock into an elegant, nuanced sound that single-handedly created what became known as Southern rock. Full of beautiful dual guitar leads and driven by double drummers, and possessing a lead singer who, when he was on his game, had as much soul as anyone around, the Allman Brothers Band were also an improvisational band who found all kinds of new corners in their classic catalog when they played live, no matter what the configuration of the band was at the time.