The title "Airflow" sounds almost too sensible for a record involving Mats Äleklint, Sten Sandell and a church organ. Air is, after all, the basic requirement of both instruments: the trombone needs a player's breath, the organ needs a mechanism to push air through pipes. But on this album air is not merely the invisible employee doing the actual work behind the scenes. It becomes the thing being shaped, stretched, interrupted and occasionally made to sound as though it has developed opinions.

Recorded at the Church of Revelation in Saltsjöbaden on March 2nd, 2026, "Airflow" contains six entirely improvised pieces, with Äleklint on trombone and Sandell on pipe organ. The recording was made, mixed and mastered by Äleklint himself, and the circumstances matter. There is no elaborate ensemble architecture here, no rhythm section to provide diplomatic relations between the two protagonists, and no predetermined composition waiting patiently underneath the improvisation. Instead, the music depends almost entirely on how accurately two experienced musicians can sense what the other is doing.

That is hardly an inexperienced pairing. Äleklint has spent decades moving between free improvisation, jazz, large ensembles and projects such as Angles and Fire! Orchestra, while working with figures ranging from Carla Bley and Dave Holland to Paal Nilssen-Love and Mats Gustafsson. Sandell has an equally formidable history, both as a member of Gush and through collaborations with Evan Parker, Sven-Åke Johansson, Paal Nilssen-Love and many others. He is also a composer whose work extends into voice, electronics, text and visual art. Their familiarity is therefore not the interesting part. The interesting part is what they choose to do with it.

"Fanfare" begins by making the trombone sound almost excessively human. Äleklint's breath produces attacks that can be abrupt, grainy or strained, while Sandell gradually establishes the organ's much larger reservoir of resonance. Yet the organ does not simply become an imposing background. It answers, interrupts and changes the apparent scale of what the trombone is doing. The two instruments initially seem to occupy different physical universes, only to discover that their sounds can meet surprisingly close to the same point.

"State of Mind" reduces the rhetoric and concentrates the listening. It is one of the album's more revealing moments because very little needs to happen for the relationship to remain compelling. A sustained organ tone can alter the perceived pitch of the trombone; a small change in Äleklint's embouchure can make the surrounding resonance suddenly feel unstable. Improvisation here is less about spontaneous invention than about extremely quick adjustments to changing circumstances.

The longer "All Aboard" develops this principle without rushing toward some grand climax. The title might suggest departure, movement and a timetable, but the music has no interest in keeping railway time. Its pace is patient, and the tension comes from the changing behaviour of the sounds themselves. Sandell can make the organ seem almost static while its internal colours continue shifting, whereas Äleklint's slide allows him to occupy the unstable territory between fixed pitches. The contrast gives the piece an unusual sense of elasticity.

There is something particularly fascinating about the organ in this context because it is both an instrument and a building-sized proposition. A trombone is carried into a room and immediately depends on the body of its player. A pipe organ remains there, occupying architecture, waiting for somebody to decide which of its enormous possibilities should become audible. Sandell knows how to exploit that disproportion without allowing the organ to win simply because it has more cubic metres.

"Broken Machine" makes the physical mechanics more conspicuous. The sounds become harder, sharper and less obviously instrumental, with the organ acquiring percussive and pneumatic qualities while Äleklint manipulates the trombone into rasping, muted and fractured forms. The title becomes almost literal without becoming descriptive: mechanisms seem to be revealing their joints. Yet there is humour in the situation too. These are two highly sophisticated musicians apparently spending several minutes investigating how much damage can be done to two perfectly respectable instruments without actually breaking either of them.

"Meeting Points", Äleklint's sole individually credited composition on the record, is more fragile. The trombone can suddenly sound intimate, almost vocal, while Sandell chooses colours that reduce the organ's monumental reputation to something thinner and more elusive. It is perhaps the clearest demonstration that "Airflow" is not simply an exercise in weight. The album understands that a large sound is not necessarily a powerful one, and that restraint can make resonance more conspicuous rather than less.

The final "Alloy" brings the album's central relationship into especially sharp focus. The word suggests combination, but also material transformation: different substances retaining their identities while producing something that neither could have produced alone. That is close to what happens throughout the record. Äleklint and Sandell never quite disappear into a single sound, despite occasionally approaching that effect. Their individual timbres remain perceptible, but the listener becomes increasingly interested in the boundary between them.

This is also where the church setting proves more than convenient acoustics. The organ inevitably carries centuries of cultural baggage, from sacred music to grand concert repertoire, while the trombone arrives with an entirely different history of military bands, jazz, popular music and experimental improvisation. "Airflow" does not attempt to reconcile those histories or turn them into some tasteful ecumenical meeting. It simply puts them in the same room and allows their physical properties to negotiate the consequences.

The most successful free improvisation does not necessarily sound free. It can sound remarkably precise because the musicians are responding with enough speed and attention to make uncertainty itself structurally useful. That is what gives "Airflow" its character. The music never feels as though Äleklint and Sandell are searching for a predetermined destination, but neither does it wander aimlessly. Each piece develops through accumulated decisions, with the players repeatedly testing how much tension a sound can carry before it needs to change.

There is also something quietly generous about the album's refusal to over-explain itself. The premise is simple: trombone, organ, air, room, six improvisations. Human beings have spent centuries finding increasingly complicated ways of making music, and then occasionally somebody remembers that two people breathing into things can still be enough.

"Airflow" is one of those occasions. Its real achievement is not that the trombone and organ sometimes become difficult to distinguish. It is that they remain unmistakably different while learning, piece by piece, how to inhabit the same acoustic reality. The music does not dissolve the distance between them. It makes that distance productive.