Some hype precedes Palm's first headlining show in New Orleans, but the validation is there to hear on last year's Audiotree Live session, in which the self-taught Philadelphia quartet lays bare its gangling, exposed-nerve guitar clatter (at one point snapping a string like a threadbare tendon in the process). The band has gotten even better since then, if new EP Shadow Expert (Carpark) is any indication — six tracks and 17 minutes that expand 2015 debut Trading Basics in every direction, shouting out a lineage of art-rock forebears while forging a clear and distinct new direction. The cut-up sonics on dissonant lead single "Walkie Talkie" are by design and also quite literal: Lyrics surfaced from magazine clippings, and the protruding melodic angles sound snipped from an extensive memory of experimental outfits (Dirty Projectors, Dodos, Battles, Wire, Talking Heads). For once, truth in advertising. Palberta and Buncho open. Tickets $10 in advance, $12 day of show.