Alt-J 's debut album , An Awesome Wave , released after 2013 .
Alt-J ( stylised as alt-J ) is an English indie rock band formed in 2007 in Leeds , by Gwil Sainsbury ( guitar/bass ) , Joe Newman ( guitar/lead vocals ) , Thom Sonny Green ( drums ) and Gus Unger-Hamilton ( keyboards/vocals ) .The band 's debut album An Awesome Wave was released in May 2012 in Europe , and in September 2012 in the United States , and won the 2012 British Mercury Prize .
Alt-J