Originally a string quartet formed by four girls (Edda Rún Ólafsdóttir, Hildur Ársælsdóttir, María Huld Markan Sigfúsdóttir and Sólrún Sumarliðadóttir) at the Reykjavík College of Music in the late 1990s, Amiina went on to cut its teeth as Sigur Rós' string section for the next decade. Now a sextet after a recent masculine infusion, Amiina released its second full length album, Puzzle, in September 2010.