For most bands, not knowing what they want to be is a problem. For My Morning Jacket, it's an opportunity. The Louisville group refused to be tagged with any one label at Avalon on Saturday, dipping into aspects of arena rock, country, power pop, prog rock, heavy metal, and reggae and melding them into a form of Americana space-rock.
It's hard to hold such disparate elements together as a unified whole, but the band pulled it off well. Too well, perhaps, as many of the songs followed the same structure, culminating in codas of lengthy soloing. If My Morning Jacket's toolkit occasionally seemed limited, though, it was still effective, with ''Lay Low" climaxing in hypnotic jamming and the speedy synth-bass midsection of ''Run Thru" ending with a long, dramatic pause before guitarist Carl Broemel launched back into the song's slow, screaming riff and singer Jim James started howling.