Watch: Austra Performs A Tiny SXSW Concert

It was hard to imagine how Austra, a clubby electronic outfit from Toronto, would sound early in the day in an intimate environment. But Katie Stelmanis and her two vocalists kindly obliged, singing a cappella to back a laptop piped to modest speakers. The result was a powerful showcase of Stelmanis' soaring voice. Watch the trio perform "The Choke" at The Driskill Hotel during SXSW 2011 in Austin, Texas. Copyright 2011 National Public Radio. To see more, visit http://www.npr.org/.