The Wind

Wind in an organ is not air. Air is what you breathe, undirected and ambient, the medium in which all sound travels but which is not itself sound. Wind is air with purpose — compressed, channeled, regulated, delivered to a pipe at a specific pressure and volume so that the pipe can speak. The distinction matters because the quality of the wind determines the quality of the sound the way the quality of a singer's breath determines the quality of the note, and a singer who breathes poorly — shallowly, unevenly, with catches and surges — will produce a tone that is unsteady no matter how skilled the vocal technique, and an organ whose wind is poorly regulated will speak with the same unsteadiness, a tremor that is not the controlled vibrato of a Tremblant stop but the involuntary shaking of an instrument that cannot find its footing.

Her father had taught her about wind on a day in March when she was twelve, a day she remembered not because of what he said but because of where they were, which was in the church of Saint-Christophe in Flavigny, the village church, where the organ was a small one-manual instrument of nine stops that her father had built in 1991 and that had been her first keyboard, the instrument on which she had learned to play before she was old enough to reach the pedalboard and had to stand on a wooden box her father had made for that purpose, a box exactly the height required for her feet to reach the lowest pedals, and which he had adjusted every six months as she grew, adding a thinner board each time, so that the box was an archaeological record of her childhood, each layer representing a period of growth measured not in years but in the distance between a child's feet and the pedals of an organ.

On that March day he had turned off the blower and asked her to play, and she had pressed a key and nothing happened, and he had said, "The organ is dead." And then he had turned the blower on and asked her to play again, and she had pressed the same key and the pipe spoke, and he had said, "The organ is alive," and then he had asked her what the difference was, and she had said, "The blower," and he had said, "No, the wind," and she had not understood the distinction until years later, when she was old enough to know that a blower was a machine and wind was a decision, the decision to give air a purpose, to take the undirected breath of the world and compress it and shape it and direct it into a pipe so that the pipe could speak, and this decision was the organ builder's first and most fundamental act, more fundamental than the voicing or the action or the case, because without wind the organ was furniture, a collection of wood and metal with no more voice than a cupboard.

Now she was building the wind system for the Dijon organ, and the work began with the reservoirs.

She had two of her father's four reservoirs. She needed two more — one for the Recit division and one for the Pedale. The reservoirs were identical in principle but different in size: the Recit reservoir smaller, because the Recit was an enclosed division with fewer stops and lower wind demand, and the Pedale reservoir larger, because the Pedale pipes were the largest in the organ, some of them five meters long, and large pipes consumed wind the way large rooms consumed heat, their volume displacing vast quantities of air with each vibration of the sound wave.

She built the Recit reservoir first because it was the smaller and because she wanted to practice the technique on a scale that was forgiving before she attempted the Pedale, which was the largest reservoir she had ever built and whose dimensions — one hundred and eighty centimeters long, ninety centimeters wide, forty centimeters deep — exceeded any reservoir in her experience, though not in her father's, who had built a reservoir of similar size for the organ in the Basilica of Saint-Madeleine in Vezelay, an instrument Marguerite had tuned twice a year since her father's death and whose wind she knew intimately, the particular steadiness of a large reservoir well-built, the way the weighted top rose and fell with the breath of the organ as smoothly as a sleeping body breathes, the rhythm of the music reflected in the rhythm of the reservoir, the organ inhaling and exhaling in time with the player's hands.

The construction of a reservoir begins with the frame, which is a box of hardwood — poplar, in her father's practice, because poplar is light and stable and does not impart any resonance to the wind, which is important because a resonating reservoir would add a low hum to the wind supply and the hum would be audible in the pipes as a coloring, a darkening of the tone that would affect every stop and every note, a pervasive contamination that could not be removed by voicing because it was not in the pipes but in the wind itself, in the medium through which the sound was generated. Poplar was acoustically neutral. It absorbed the vibration of the wind without amplifying it, the way a good foundation absorbs the load of a building without transmitting it as vibration to the floors above.

She cut the poplar boards on the table saw, each board planed to a thickness of twenty-two millimeters, and assembled the frame with dovetail joints and hide glue, a construction method her father had used because dovetails were self-aligning and hide glue was reversible — it could be softened with heat and water if the joint needed to be disassembled for repair — and reversibility was a principle her father applied wherever possible because an organ was not a disposable object but a permanent one, an instrument intended to last centuries and to be maintained and restored by builders who had not yet been born, and those future builders would need to be able to take the organ apart without destroying it, the way a doctor takes a body apart without killing it, which required that every joint and every seal and every connection be designed to come apart as easily as it went together, the principle of reversibility being, in organ building, a form of courtesy to the future.

The frame assembled, she lined the interior with thin sheepskin, glued flesh-side to the wood with hide glue applied hot and smoothed with a bone folder, the leather covering every interior surface so that the reservoir was airtight without the use of synthetic sealants, which her father had refused on the grounds that synthetic materials did not age gracefully — they hardened, cracked, and failed unpredictably, while leather aged by becoming softer and more supple, improving with time the way wood improved with time and metal improved with time, the natural materials approaching their ideal condition over decades while the synthetic materials departed from theirs.

The top of the reservoir — the weighted lid that rose and fell with the air supply — was a separate frame, also lined with leather, connected to the body of the reservoir by a continuous hinge of leather along the back edge. When the blower pumped air into the reservoir, the top rose against the weight — iron plates, calculated to produce the target pressure of seventy-five millimeters. When the organ drew air from the reservoir, the top fell, and the weight compressed the remaining air, maintaining the pressure. The system was self-regulating, a mechanical feedback loop that had been in use since the medieval period and that worked with a reliability that electronic pressure regulators could not match, because the reservoir's regulation was continuous and analog — the weight adjusted the pressure smoothly, without the stepping and hunting that digital controllers exhibited — and the result was a wind that was alive, that breathed with the organ, that responded to the player's touch in a way that electronic regulation did not, the subtle changes in wind pressure as the organ moved from soft to loud, from a single stop to a full chorus, giving the instrument a dynamic vocabulary that was part of its expression, part of what made a mechanical organ feel like a living thing rather than a machine.

She completed the Recit reservoir in three days and tested it by connecting it to the workshop's blower with a temporary wind trunk and measuring the output pressure with a water manometer — a U-shaped glass tube filled with colored water, connected to the reservoir's output, the difference in water level between the two arms of the tube indicating the pressure in millimeters. The manometer read seventy-four millimeters, one less than the target, which she corrected by adding a thin iron plate to the weight stack, bringing the pressure to seventy-five exactly, and she marked the reservoir with the brass plate — "REC — 75mm" — and set it aside.

The Pedale reservoir took a week. Its size required her to work on the floor because the workbench was not large enough to hold the frame, and working on the floor meant working on her knees, which was the posture of organ building — she had spent more time on her knees in churches and workshops than any supplicant, and the irony was not lost on her, the organ builder kneeling not before God but before the instrument that was supposed to bring the listener closer to God, the builder's faith invested not in the divine but in the material, in the wood and leather and metal that, assembled with sufficient care, could produce a sound that some listeners described as divine, though Marguerite did not believe that sound could be divine, only that it could be honest, and honesty in sound was rare enough that people reached for the sacred to describe it.

She glued the leather with particular care on the Pedale reservoir because the joints were long — one hundred and eighty centimeters of dovetail along each side — and a leak in a Pedale reservoir would be devastating, the low-frequency pipes consuming so much wind that even a small leak would cause the pressure to drop when the loudest stops were drawn, and a pressure drop in the Pedale would be audible as a sagging of the bass, the low notes losing their definition and weight at the moment they were most needed, which was when the organist pulled the full organ and the Pedale provided the foundation on which everything else stood.

She tested the Pedale reservoir and found the pressure correct at seventy-five millimeters and the response smooth — the top rising and falling evenly, without sticking or jerking — and she marked it and set it beside the Recit reservoir and looked at the four reservoirs together, two of her father's and two of hers, and she could not tell them apart visually, which pleased her in a way she examined carefully to make sure it was pride in the work rather than pride in the imitation, because the two kinds of pride were different, the first being a confidence in her own skill and the second being a dependence on her father's approval, and she needed the first and could not afford the second because her father was not here to approve and would never be here to approve and the work had to stand on its own merit, judged by the wind it held and the pressure it delivered and the sound it made possible.

The wind trunks came next — the channels that connected the reservoirs to the wind chests, carrying the pressurized air from the storage to the distribution point. A wind trunk was a rectangular duct, built of wood and lined with leather, running from the output of the reservoir to the input of the wind chest, and its construction was straightforward — boards joined and sealed, the interior smooth so that the air flowed without turbulence — but its routing was not, because the trunks had to navigate the interior of the organ case, passing between the structural beams and around the action mechanism and under the pipe feet, and the route of each trunk had been determined by her father in the drawings, which showed the trunks in plan and section view as dashed lines threading through the architecture of the organ like arteries through a body.

She built the trunks in sections, each section dry-fitted in the workshop before being sealed with leather, and she followed her father's routing because the routing was determined by the case geometry and the case was already built and installed in the cathedral, its internal dimensions fixed, the spaces through which the trunks would pass already defined. There was no room for deviation even if she had wanted to deviate, and she did not want to, because the wind system was the one part of the organ where her father's design and her own judgment coincided perfectly — the physics of wind delivery was not subjective, the pressure and volume required were calculable, the routing was geometric, and the only decisions that mattered were decisions of craft rather than art, decisions about the quality of the joinery and the tightness of the seals and the smoothness of the interior surfaces, and these decisions she made with the confidence of a person who knew her craft even if she was less certain of her art.

The wind system took three weeks to complete — four reservoirs, four main trunks, the branching ducts that distributed wind from each trunk to the multiple toe holes on each wind chest, the valves that allowed each division's wind supply to be shut off independently. When it was finished, laid out on the workshop floor in a pattern that corresponded to the layout of the organ in the cathedral, the wind system looked like a circulatory diagram, a network of channels branching from a central heart — the blower — through the main arteries — the trunks — to the capillaries — the toe-hole ducts — that would deliver wind to each individual pipe, twenty-five hundred endpoints, each one capable of receiving air at seventy-five millimeters of pressure, each one connected to every other by the shared medium of the wind, so that when one pipe spoke it drew from the same supply as every other pipe, and the reservoir's job was to ensure that this shared drawing did not deplete the supply, that the pressure remained constant whether one pipe was speaking or a hundred, the way a heart maintains blood pressure whether the body is resting or running.

She stood at the edge of the wind system and looked at it and thought about her father and the day in the church when he had said "the wind" and she had not understood, and she understood now, she understood that the wind was the thing that connected every pipe to every other pipe, the medium through which the organ's unity was achieved, the shared breath that made the forty-two stops not forty-two separate instruments but one instrument with forty-two voices, and the quality of this shared breath — its steadiness, its responsiveness, its transparency — was the quality that the listener would never hear directly but that the listener would feel in the coherence of the sound, the sense that the organ spoke with one intention even when it spoke with many voices, and this coherence was the wind's gift to the organ, the gift of a medium that held everything together without being heard, the way gravity holds a building together without being seen.

She thought about the word her father had used for sustain — "la patience" — and she thought that patience was a quality of wind, the wind's willingness to wait in the reservoir for the key to be depressed, to hold its pressure in readiness, to be available without asserting itself, the way a patient person is available without demanding, present without insisting, ready without rushing, and she thought that she had not been patient enough in the weeks since the commission, that she had been anxious about the voicing notes and the deadline and the question of fidelity, and that the anxiety had made her rush through the inventory and the ordering and the casting when she should have been deliberate, the way the wind was deliberate, moving from the blower to the reservoir to the trunk to the chest to the pipe at a pace determined not by urgency but by physics, by the relationship between pressure and volume and resistance, a relationship that could not be hurried without being distorted.

She would be patient. She would build the remaining components — the wind chests, the action, the console — with the steadiness the wind demanded, and when all the components were built she would install them in the cathedral and connect the wind system and turn on the blower and listen, for the first time, to the sound the reservoirs made when they filled, the low sigh of leather expanding under pressure, the creak of the weight rising, the subtle whisper of air moving through channels too large to produce a tone but not too large to produce a presence, the awareness that the organ was alive, that it was breathing, that it was waiting for someone to press a key and release the wind into a pipe and hear what came out.

And what came out would be the beginning of the voicing, the first sounding, the moment when the pipe's potential became the pipe's reality, the moment her father had described as "le choix" — the choice — the instant when the air-sheet met the upper lip and was split and the pipe decided which direction the sound would go, and Marguerite would be there for that instant, her ear against the pipe, her tools in her hand, and she would listen not for the sound she expected but for the sound that came, because the organ that was waiting to be heard could not be predicted, only received, and receiving required patience, and patience required wind, and wind required the system she had just built, the system that would give the organ breath.

The workshop was warm now, the heater running, the late November light fading in the north windows, and the wind system lay on the floor like a map of the organ's interior life, its channels and branches and junctions describing a geography that only the air would ever travel, an invisible landscape inside the visible instrument, and Marguerite covered the components with cotton sheets and turned off the lights and went into the house and sat at the kitchen table with a glass of wine from a domaine in Fixin whose owner she knew because she had restored the organ in his village church and he had paid her partly in wine, six cases of Fixin Premier Cru that she kept in the cellar beneath the house and that she drank sparingly because the wine was good and because drinking it reminded her of the organ in the church in Fixin, a small instrument of eleven stops that she had cleaned and revoiced and that now spoke with a clarity the priest attributed to God and the organist attributed to Marguerite and Marguerite attributed to the acoustic of the church, which was a twelfth-century nave with a barrel vault that returned every sound to the listener with a delay of three seconds, long enough for the sound to develop its full harmonic spectrum before it reached the ear, short enough for the individual notes to remain distinct, and this acoustic was the real author of the organ's sound, the room shaping the instrument the way a riverbed shapes the river, and Marguerite had simply adjusted the pipes to speak well in that particular room, which was not genius but attentiveness, the ability to hear what the room wanted and to give it that.

She drank the wine and ate bread and cheese and thought about the Dijon cathedral and its six-second reverberation and the seventy-five millimeters of wind pressure her father had specified and the way these two numbers — six seconds, seventy-five millimeters — defined the acoustic envelope of the organ, the time the sound had to develop and the energy available for its development, and she thought that her father had chosen these numbers with the care of a person who understood that an organ was not an instrument placed in a room but an instrument created by the room, the room's dimensions and materials determining what kinds of sound could exist within it and for how long, and the organ builder's job was to build an instrument that exploited the room's acoustic properties rather than fighting them, an instrument that let the room do what the room did best, which in the case of Saint-Benigne was to sustain, to hold a sound in the air for six seconds after the pipe had stopped speaking, so that the organ's voice lingered in the nave like a thought that continues after the thinker has moved on to the next thought, the previous thought still present, still resonating, still contributing to the texture of the mind.

Six seconds. Seventy-five millimeters. These were the parameters of the organ's life, the boundaries within which the voicing would take place, and Marguerite noted them on a piece of paper and pinned the paper to the wall above the voicing machine, where she would see them every day as she voiced the pipes, a reminder that the organ she was building was not for the workshop but for the cathedral, not for the neutral acoustic of the pine-lined room but for the reverberant acoustic of the limestone nave, and every adjustment she made at the voicing machine would have to account for the transformation the sound would undergo when it left the pipe in the workshop and entered the pipe in the cathedral, the same pipe, the same voicing, but a different room and therefore a different sound, and the voicer's art was to predict this transformation and to voice the pipe in the workshop so that it would sound right in the cathedral, which was an act of imagination as much as an act of craft, an act of hearing a room you were not in and adjusting a sound you could not yet hear to a space you could not yet occupy.

She finished the wine and washed the glass and went to bed and lay in the dark and listened to the wind outside, the real wind, the November wind that moved through the walnut tree and over the limestone wall and through the gaps in the shutters with a sound that was not music but was the material from which music could be made, the raw breath of the atmosphere, undirected and purposeless, waiting for someone to compress it and channel it and direct it into a pipe and give it a voice.