Crazy about phones? Then listen up. For British artist Beachers spent a day in his London office, and with his smartphone, recorded the sound of a landline waiting for you to dial a number after lifting the receiver. An innocent, yet somewhat insistent sound: Use me, beep-beep-beep-boop, now!

He cut up the recording, panned it around, shifted the pitch here and there, and dabbed it with delays. Turned it into musical material, in other words. And from the effort, Off the Hook grows small tones and harmonies like those from a self-built organ. But the office noises follow along, making the little album feel oddly haunted.

There are white creaks, maybe from a chair. Treble screams like distant, escaped parakeets. Short keystrokes, mysterious silences. After the harmonic organ opening, Beachers lets a deep bass rumble beneath chopped-up beeps. Layers are added, or sudden shifts occur. It’s not meant to be perfectly polished; you’re meant to feel that a human is playing with the digital.

Patiently, small pulses build, maybe even a beat. Listen to the hidden parties and drives of everyday life, the music seems to say—but also: see what we can do to pass the waiting time while forgetting what we’re actually waiting for—someone to pick up, the boss to let us off, death catching up to us.

In the end, only the raw recording is heard. A minute of beeps, boops, and random noise. As if each motif bows to its audience. What a strange release, nostalgically so in its way. And how creative.

Josefine Opsahl herself sits on stage in the Australian-Danish choreographer Tara Schaufuss’s ballet Passengers of Passing Moments, for which Opsahl has composed the music. In fact, she almost steals all the attention from the ten dancers, as it is fascinating to watch the 32-year-old cellist’s theatrical immersion and her very active use of her right leg to control the loop and effects box.

The nearly half-hour ballet score is inspired by Bach, but also conveys a highland-like sense of drama through sampled breathing, stabbing subdivisions, and pronounced reverberation. It begins with delicate, bright major-key tones, but quickly moves into the depths, finding throbbing bass and timpani-like resonance. Emotions rush through every bow stroke.

The theme of the ballet is time. In fleeting moments, the dancers are caught in Opsahl’s small, mechanical loops; later, a dark, melancholic space is established, in which a young woman sinks into a memory. Extended sounds and overtones signal a time put out of joint; a faint wind is heard, a ticking fades in, and suddenly she has dreamed her beloved into being.

The woman moves like a ghost among the other bodies as Opsahl intensifies her playing, shifting between triple and quadruple meter. At one point, it is as if she disappears entirely into the violent temperament of the music; her dramatic flair turns Bach into an Avenger-like hero, and this suits Schaufuss’s focus on the force of emotions remarkably well. It is saturated, direct, and seemingly made for a grippingly intense choreography. A powerful partnership on the grand stage.