Fani Konstantinidou has a peculiar way of making a space speak. Not metaphorically - literally. Her new work, Undertones, listens to buildings, hallways, the air under a museum roof, the inside of an organ’s chest, and then lets them talk back through percussion and electronics. It’s the sound of architecture re-enacting its own acoustics, a duet between flesh and façade.

Originally conceived for a four-channel setting, Undertones has now been condensed into stereo - not simplified, just folded in on itself like origami made of resonance. The work unfolds in four movements, part graphic score, part improvisational game, where musicians are instructed to record short fragments of sound from around the performance space and feed them back into the piece. The result is something between composition and cartography - a sonic map that redrafts itself at every playback.

For this recorded version, Konstantinidou harvests fragments from Amsterdam’s cultural organs - quite literally. There’s the grand Concertgebouw organ, eerily silent of audience; the Utopa Baroque Organ in Orgelpark, recorded from inside its pipes; and the metallic hum of the Stedelijk Museum’s exterior roof. These field recordings don’t decorate the music - they anchor it, grounding the abstract percussion and electronic layers in the tangible hum of place.

The four movements - “Undertones I–IV” - behave like slow tidal shifts. Metallic shivers dissolve into deep electronic breathing; distant rumbles mutate into ghostly harmonics; the boundary between recorded and performed sound becomes impossible to trace. It’s immersive, occasionally unsettling, and surprisingly sensual in its treatment of resonance. Imagine Éliane Radigue and Z’EV attending a séance at the Rijksmuseum - the walls hum, the floor trembles, and nobody speaks for fear of breaking the spell.

Konstantinidou, a Greek-Dutch composer and performer with a background in exploring sonic identities across cultures and spaces, has been quietly building a body of work where context is composition. "Undertones" fits beautifully within the Moving Furniture Records ethos - that Amsterdam micro-institution where drone, minimalism, and field recording merge into a patient aesthetics of listening. But unlike many of her labelmates, Konstantinidou never treats sound as abstraction; her music breathes with biography, with locality, with dirt and air.

This is music that refuses to perform - it inhabits. The percussive idiophones, the electro-acoustic murmurs, the environmental traces: all coexist as if tuning a memory. The result is both intellectual and bodily, a work that rewards close listening but also just feels right vibrating through a pair of good speakers late at night, when you’ve forgotten the world still has a pulse.

If there’s a moral here (and there might be), it’s that sound is never neutral - it’s always a witness. In "Undertones", Fani Konstantinidou lets the world testify in overtones, echoes, and gentle shivers of presence. And somehow, that’s more political than any speech.