It was only last year that Sigur Rós put out Valtari, a gorgeously dreamlike, yet sedate record. Typically with the ethereal and cinematic Icelandic band we can expect a gap of a few years between albums. But now we’re already getting a new record, Kveikur, and if the first track to surface, “Brennisteinn,” is any indication, the band is apparently moving in a more aggressive direction.