David Wax Museum

Insanely cheerful boy-girl 'Mexo-Americana' (for which read Appalachian-edged indie with accordion, autoharp, traditional donkey jawbone percussion and more energetic handclaps than most of us dull souls manage in an average lifetime) from Boston-based David Wax and Suz Slezak, here playing from brand new and super summery album 'Knock Knock Get Up'. (It's their fourth, but more fresh-faced than ever.)