Though Sean Jefferson has certainly made it his life’s work to try and master the vast traditions set forth by the long lineage of elite jazz skinsmen before him, he never set out to make music strictly for drummers. Or musicians. Or even jazz fans. Yes, he has studied rigorously. Yes, he has a knack for putting a fresh, cerebral spin on meter. Yes, he grooves hard and swings tight. But Jefferson has since day one been in search of his own voice. And, though he is already pushing jazz drummin...