Though rightfully associated with the jam band circuit, the Derek Trucks Band is much more than a musical backdrop for the youthful tie dye set. Built on top notch songwriting, impeccable musicianship, and a solemn commitment to putting music before personality, the group is a throwback to the blues/gospel tradition that forms its biggest influence. The sextet also has an openmindedness to music that seems increasingly rare on today’s rock circuit. Every show feels…