It’s no secret that traditional jazz is an amalgam of musics from Europe, Africa, and the Americas fused into a distinctive cultural expression by the native genius of New Orleans, and you can hear it in its most glorious and debased forms all over this city. But you will never hear it quite the way pianist Tom McDermott and clarinetist Evan Christopher play it (with Matt Perrine on sousaphone and bass and Michael Skinkus on drums), and you will not likely encounter its spirit in a purer form...