At what point does sound become music, and music sound? The practice of the renowned European improvising quartet Dans les arbres – three Norwegians and a Frenchman – explores the ambiguous edge-lands between these binary extremes. By blurring the border separating one from the other, they find music in sound, and vice versa, through spontaneous compositions of striking beauty and tactility. In performance, they move with great precision through different combinations of players and instruments, as if navigating an uncertain course towards some mysterious destination. While their wide variety of customized noises can suggest the heroic late modernism of John Cage as well as the bleep, burr and hum of the technological present.