The solo project of the Knife's Karin Dreijer, Fever Ray shares some of her main group's icy electronic atmospheres, but takes a slightly more organic-sounding approach. Fever Ray began after the Knife finished their promotional duties for their 2006 album Silent Shout and Dreijer had her second child; she worked on demos and song ideas by herself, then collaborated with producer Christoffer Berg, who had mixed the Knife's music. Word of the project surfaced during the summer of 2008 and the first music, an instrumental version of "If I Had a Heart," appeared on Fever Ray's MySpace page that fall. Fever Ray was available in January 2009 as a digital download, and the album was physically released that spring.