The Wilfreds’ singing seems all the more urgent when it is riding atop a band that is in this state of what we might call restrained agitation. And it is this interplay that breeds that sense of mystery, where both parties are enriching the other’s tradition; when the Dreaming of the Yolngu people intermingles with Western flights of imagination; where any demarcation line between ritual and creativity is blown away in a sand-storm of sound.