John Paul White is a Tiny Desk veteran two times over: He's performed once as a solo artist and once as half of the decorated and now-defunct Americana duo The Civil Wars. So he was a natural to take the stage for NPR Music's Tiny Desk Family Hour, a nearly four-hour marathon of concerts in miniature, held at Austin's Central Presbyterian Church during SXSW on Tuesday night. The room felt at once packed and cavernous, with White perfectly suited to the setting. He's got a voice made for high ceilings, with swooping strains of Roy Orbison, radiating intimacy to match the crowd's pin-drop silence.