FILE - This March 21, 2013 file photo shows English indie rock band Alt-J, from left, Thom Green, Gwil Sainsbury, Joe Newman and Gus Unger-Hamilton at the Radio 104.5 iHeartradio Perf

 

              FILE - This March 21, 2013 file photo shows English indie rock band Alt-J, from left, Thom Green, Gwil Sainsbury, Joe Newman and   Gus Unger-Hamilton at the Radio 104.5 iHeartradio Perf
FILE - This March 21, 2013 file photo shows English indie rock band Alt-J, from left, Thom Green, Gwil Sainsbury, Joe Newman and Gus Unger-Hamilton at the Radio 104.5 iHeartradio Performance Theater in Philadelphia. Their debut album, "An Awesome Wave," went on to win the prestigious Mercury Prize given to the top album of the year in the United Kingdom and Ireland. The Cambridge quartet has since been a near constant conversation piece on the blogosphere and mid-sized club circuit on both sides of the Atlantic Ocean. (Photo by Owen Sweeney/Invision/AP, file)