Alt-J lead vocalist Joe Newman gives his unique voice a break during the band's show at NPR Music's SXSW showcase at Stubb's in Austin. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR

Trevor Powers of Youth Lagoon performs at NPR Music's 2013 SXSW Showcase at Stubb's. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR

Katie Crutchfield of Waxahatchee performs at NPR Music's 2013 SXSW Showcase at Stubb's. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR