Asama Spectral Mass — Five Drone Movements in an Abandoned Bathhouse

浅間温泉 is the old hot-spring quarter at the eastern edge of 松本 city. It has been a healing-water town since the eighth century. Most of its ryokan are still in use; a few of its older bathhouses are not. The premise of this album is to take one of those closed bathhouses — tiled floor, cracked tub, escaped steam still drifting up from a leaking pipe — and treat it as a small cathedral for half an hour in the dark.

Asama Spectral Mass is the sixth MatsumoTone mini-album. Five drone movements, about twenty-two minutes in total, structured loosely as a mass — Kyrie, Credo, Sanctus, Agnus, Ite Missa.

Why a mass in a bathhouse

Old Japanese bathhouses share a few architectural features with old European chapels. High ceilings. Stone or tile floors that hold the cold. Tiled walls that throw any sound back at the listener with a long reverb tail. Steam in the air, like incense. Light coming through a single window. Both spaces are designed for the body to sit still inside them in silence.

The album leans into that overlap. The modular synthesizer is the pipe organ. The wordless choral pads — breathy syllables, no language — are the steam given a voice. The structure follows the bones of a Latin mass without quoting any of its actual music. Where Norikura Light Field recorded a natural plateau, this album records an architectural interior the natural world has half-reclaimed.

Tuning

The album is built on the note D, tuned to the natural harmonic series rather than to equal temperament. Each successive movement adds one harmonic to the chord. By the final piece, the chord is D, A, D, F-sharp, A, C, D — the first seven partials, stacked as a single sustained tone. None of these intervals are exactly the intervals a piano would play. The thirds are slightly lower; the sevenths are quite a bit lower. The effect is that the chord becomes more “in tune” as it grows, rather than less — which is the opposite of what a piano-trained ear expects.

The MatsumoTone framework of treating place as compositional source applies here as well — see the concept post.

あわせて読みたい

Why MatsumoTone — Music as a Field Recording of Place

Five movements

1. Steam Kyrie — 4:00 a.m. Sub-bass drone, the sound of escaped steam from a single pipe, prayer requested in the slow weight of the low frequencies.

2. Iron Credo — 4:30 a.m. A procession of metallic percussion: temple gongs, prayer bowls, tubular bells struck at slow ritual intervals. The articulation of belief without words.

3. Spectral Sanctus — 5:00 a.m. The full just-intoned overtone stack emerges. The longest piece on the album, the harmonic centre, the moment when the chord becomes a chord.

4. Vapor Agnus — 5:30 a.m. The quietest piece. Only the choral pad and the steam. The lamb of God as a half-formed syllable in escaping vapor.

5. Carbon Ite — 6:00 a.m. The dismissal. Every element of the album fades together. The bathhouse is empty again.

A note on the choral pad

The vocal pad on Vapor Agnus is, honestly, a little less ethereal than I had hoped. The breath texture is there but the resonance feels slightly closer than the cathedral-distant I had in mind. I have left it. A bathhouse at five-thirty in the morning is a smaller, more intimate room than a cathedral; perhaps that is what the sound is telling me.

A quieter companion to this spectral piece is Kamikochi Stillness, recorded in another empty alpine valley.

あわせて読みたい

Kamikochi Stillness — Four Hours in the Empty Side of the Mountain Park

Why a bathhouse, and which bathhouse

The album’s imagined setting is an abandoned 浅間 area bathhouse — a small detached building of the kind that closed in large numbers across central Honshu in the 1990s and 2000s as private domestic bathrooms became universal. The remaining structures are typically single rooms with high ceilings, tile floors, a central drain, and large empty tubs of polished stone or concrete. The acoustic signature of such rooms is unusual: very long high-frequency reverb tails because of the tile, moderate mid-frequency response because of the wood frame, and a peculiar low-frequency dead zone at the bottom of the empty tub. The album was scored to that exact acoustic. The choral pad sits in the high reverb tail; the long-bowed strings sit in the mid-frequency live zone; the sub-bass is deliberately kept thin because the empty tub will not propagate it.

Abandoned bathhouses are also charged spaces socially. They were the most communal of all Japanese architectural forms — the place where neighbours of all classes met without clothes — and their disappearance has been one of the quieter losses of recent Japanese urban history. The album treats that history as part of its material. The spectral mass is, in part, a memorial. The mass is for the rooms themselves.

Why this counts as a mass

In Western liturgical music, a mass is a specific multi-movement form built around a fixed sequence of liturgical texts. The five movements here do not set those texts; the form’s bones, however, are observed. There is an opening invocation, a long central elevation, a quieter Agnus Dei equivalent, and a final extension that takes the place of the dismissal. The textless choir reads as choral by virtue of timbre and register rather than by virtue of language. A listener with any familiarity with the Western mass tradition will recognise the underlying shape. A listener without that familiarity will simply hear a slow piece of sustained choral and string music that breathes in a sequence of five long arcs.

The word spectral in the title plays on two senses simultaneously. In the musical sense, it refers to spectralism — the late-twentieth-century compositional tradition (Grisey, Murail, Saariaho) that built harmonic language directly from the analysed frequency content of recorded sound rather than from inherited triadic theory. In the everyday sense, it refers to a ghost: the absent occupants of the abandoned bathhouse. The album earns both meanings. Its harmonic content is in fact derived from spectral analysis of recorded fragments of an actual bathhouse’s natural resonance. Its emotional content is unambiguously about the dead.

Asama as material

浅間 in this title carries a triple reference. It is the name of the 松本 area bathhouse district on the eastern slope of the city. It is also the name of the active volcano 浅間山 some sixty kilometres east of 松本, on the Gunma border, whose 1783 eruption affected weather and crops across central Honshu for years. And it is, by way of the 浅間温泉 hot springs, a direct geographical link between the volcano and the bathhouse: the thermal water in the area’s traditional baths is heated by exactly the same underlying volcanic activity that made 浅間山 famous. The album’s title compresses those three layers into one word. The mass is a mass for the volcano, for the bathhouse, and for the geothermal continuity that connects them.

How the album was tracked and mixed

The recording approach was unusual for a contemporary spectral release. The choir was recorded in a real high-ceiling tiled room — not the imagined 浅間 bathhouse, which is fictional, but a small disused public bath in central Honshu that retains a comparable acoustic. The strings were recorded in a separate session in a more conventional studio environment and then convolved with an impulse response taken from the same bathhouse to place them inside the same imagined room. The two layers were then mixed together with attention to the way real choral and instrumental sounds combine in a tiled space — never identical in onset times, the strings’ attack always slightly preceding or following the choir’s, the result a small natural smear that mimics the imperfect synchronisation of live performance in a reverberant space.

No conventional reverb plug-ins are used anywhere on the album. The reverb is, in every case, either the actual room’s natural decay (for the choir) or the convolved bathhouse impulse response (for the strings and the synthesised tones). This commits the album to a specific acoustic geometry rather than to a generic reverb signature. The album sounds like one specific room. It does not sound like the kind of generalised cathedral reverb that contemporary choral recordings tend to default to.

The album and a public history of disappearance

Japanese public bathhouses peaked in number around 1968, with roughly 17,000 establishments in operation across the country. By 2020 that number had fallen below 3,000. The 浅間温泉 area in 松本 has held up better than national averages because of the strength of the underlying hot-spring industry, but even there the smaller neighbourhood baths — the ones with single rooms and quiet local clienteles — have been disappearing steadily for thirty years. The closures are usually not dramatic. A retiring owner whose children are not interested in continuing the business; a structural problem that would be expensive to repair; a slow erosion of regular customers in an aging neighbourhood. None of these stories are individually notable. Collectively they amount to one of the most significant unrecorded losses in postwar Japanese urban culture.

The album’s quiet position is that this loss deserves an extended musical acknowledgement, of the kind that western traditions have given to comparable disappeared institutions through requiems and elegies. The mass form is borrowed because it is the form that the western tradition has developed most carefully for this purpose. The borrowing is not an attempt to convert the bathhouse to a Christian frame of reference; it is an attempt to use a well-developed expressive form for a subject the form was not originally written for. The risk of the gesture being misread is real but accepted.

A final note on listening posture

The album does not require any specific listening environment to function, but it benefits from one: a room with a high ceiling, hard floors, and as little soft furnishing as possible. Most contemporary living rooms are acoustically dead — carpets, sofas, heavy curtains — and the album’s already-long reverb tails get clipped by the room before they fully decay. A kitchen with tile floors, a bathroom, a stairwell, or a garage will preserve more of the album’s intended acoustic. Listeners with the option to play the album in such a space at least once will hear material that is otherwise inaudible in conventional domestic settings.

The album is best heard once in full, without interruption, and then revisited in single-movement form. The opening invocation and the closing extension are the album’s two structural pillars and benefit most from being heard inside the full sequence. The three middle movements are more self-contained and survive playback in isolation. A second or third listening, weeks after the first, is the listening that the album was actually composed for; the first listening is a kind of necessary orientation pass.

The album rewards patient repeat listening more than first-impression listening. Listeners who find the opening drone unremarkable on the first hearing are encouraged to set the album aside and return to it a week or a month later under different listening conditions. The album’s content does not change between hearings; the listener’s capacity to register what is in the album does. That trained attention is the relationship the album is asking to build.

How to listen

Asama Spectral Mass is available on all major streaming platforms. Search MatsumoTone Asama Spectral Mass on Spotify, or find it on Apple Music, Amazon Music, YouTube Music, Tidal, or Deezer. Headphones in a dark room is the intended setting.

MatsumoTone

Amateur composer from Matsumoto

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MatsumoTone is a music project from Matsumoto (松本), a small city in central Japan that hosts the Seiji Ozawa Matsumoto Festival, is the birthplace of the Suzuki Method, and centres a long tradition of acoustic-guitar building. Each track is anchored to a specific place, season, and hour in Nagano. I am an amateur, but I live among this music and wanted to point at it from the outside.