At the beginning of November 2009, the Scandinavian duo Svein Berge and Torbjørn Brundtland aka Royksopp released a bunch of remixes of its latest production « This must be ». On the following article, we will only speak about the Maxime Dangles remix. « This Must Be It » features Karin Dreijer Andersson, part of The Knife, well-known for its famous track « Marble house », which used the voice of this girl. But it not the first cooperation between Karin Dreijer Andersson and Royksoop. Indeed, their already work together for the « What else is there » track, famous for its remix by the Danish producer Trentemoller.