It's seriously clammy as you step down into the Cisterns beneath Søndermarken – humid, with brick columns dripping with condensation and chalk stalactites hanging down. A piano has been left down here for five months, slowly deteriorating. I was skeptical about Opløsninger: yet another Annea Lockwood-inspired work, simply inflicting violence on a poor instrument? And if not, is a composer like August Rosenbaum, who works with short, vibe-friendly piano pieces, the right person to elevate the idea into something greater? Yes, as it turns out, fortunately.

Together with visual artist Ea Verdoner, Rosenbaum has created an installation piece that spans three chambers, and in the first, you indeed see the decayed piano with centimeter-thick mold patches on the keys. As you shuffle along to the second chamber, Rosenbaum sits in the dark in front of a better-preserved grand piano. His playing is both minimalist and grandiose, but it’s the breaks in the composition that truly captivate me. Half motifs, repeated triplets, tritone-like intervals. Rosenbaum loops a captured sound from the decayed piano on a sequencer, gets up, and walks away briskly. He returns and turns up the industrial rumble of a gong, as if he were Trent Reznor in the studio. Combined with choreography about duality, a voice-over about life and birth, and a video about the body and decay, it becomes an exciting and reasonably new depiction of the raw, cold, and arbitrary nature of decomposition.