MY MORNING JACKET Undeniably rooted in the school of alt-country that worships Neil Young, MMJ has mushroomed over the years into an ensemble bent on randomly mining genres as the band members choose. The foundation is roots-rock, but anything is game — neo-psychedelia, shoegazing, rock, pop, country. The combo is fully self-defined and tailor-made if you dig bending genres into an expanse of sound where a floating tune can convulse into a reverb-laden, effects-loaded, noisy conclusion. The blokes play music as they please, and that eclecticism is no better displayed than with the sonic evolution that bookends “Old September Blues,” from their debut, to “Holdin’ on to Black Metal,” from the recent Circuital. With Band of Horses. $40-$60. Aug. 25, 7 p.m. Time Warner Cable Uptown Amphitheatre, 1000 N.C. Music Factory Blvd. 704-549-5555.