Southeastern is not a record Jason has made before, and not simply because the glorious storm and drama of his band, the 400 Unit, is absent. They will tour together; it’s not a break-up record, not an album of dissolving, but, rather, songs of discovery. And not at all afraid, not even amid the tears. Which is to say that he has grown up. That it has been a dozen years since he showed up at a party and left in the Drive-By Truckers’ van with two travel days to learn their songs. And then taught them some of his songs in the bargain.