It works for me.
After I graduated from Oberlin, we lived in a rented four-bedroom farmhouse with a huge yard in the rolling countryside a few miles outside the town. Foreshadowing fracking, there was a natural gas well on the property that supplied the house. It was a great place to live, but there were some drawbacks. The gas flowed freely from the well in warm weather, but was sluggish in cold. The furnace was mounted on tall legs because the basement flooded. All the plumbing in the house was in a wing that included kitchen, bathroom, and laundry machines, but the basement didn’t extend under the wing, so the pipes froze in cold weather.
After a couple winters there, we had wrapped the pipes with electrified heating tape, mastered how to set the furnace to run just enough when the gas well was weak, and learned to anticipate when the basement would flood so we could run a pump and head off the mess.
Outside, there was a beautiful redbud tree, several huge willows, acres of grass to mow, and the residual effects of generations of enthusiastic gardening. One summer, the peonies on either side of the shed door grew at radically different rates. One was huge and lush while the other was spindly. I was curious until I investigated and found an opossum carcass under the healthy one. Not that you would read The Diapason for gardening tips, but I can tell you that a dead ’possum will work wonders for your peonies!
I wanted to care for that landscape, so I bought an old walk-behind Gravely tractor with attachments. I could swap mower for roto-tiller for snow-blower, and there was a sulky—a two-wheeled trailer with a seat that allowed me to ride behind when mowing. I remember snatching cherry tomatoes off the vines, hot from the sunlight, as I motored past the garden.
I was the only one who could get the Gravely to start, at least I think so, given that I was only one who used it. It had a manual choke that had to be set just so. Then, as I pressed the starter button with my right toe, I’d move the throttle from fully closed to about a quarter open, and the engine would catch. I’d run it at that slow speed for about ten seconds, and it would be ready to work. If I did anything different, it would stall.
The bigger the toys . . .
I learned a lot about machines from Tony Palkovic who lived across the street. He had an excavating business and owned a fleet of huge machines. One weekend I helped him remove the drive wheels from his 110,000-pound Caterpillar D-9 bulldozer to replace the bearings. It involved a couple house jacks and 6-inch open-end wrenches that were eight feet long and weighed a hundred pounds. He used his backhoe to lift the wheels off the axles, not a job for “triple A.” I admired his affinity for his machines, and it was fun to watch him operate them. The way he combined multiple hydraulic movements with his fingertips on the levers created almost human-like motions, and he liked to show off by picking up things like soda cans with the bucket of a 40-ton machine.
The soul of the machine
In The Soul of the New Machine (Little, Brown, and Company, 1981), author Tracy Kidder follows the development of a new generation of computer technology, and grapples with the philosophical questions surrounding the creation and advances of “high-tech.” We’re beholden to it (witness the lines at Apple stores recently as the new iPhone was released), but we might not be sure if the quality of our lives is actually improved. Yesterday, a friend tweeted, “There’s a guy in this coffee shop sitting at a table, not on his phone, not on a laptop, just drinking coffee, like a psychopath.” Have you ever sat on a rock, talking with a friend, dangling your toes in the water until the rising tide brings the water up to your knees?
There’s a mystical place where soul and machine combine to become a pipe organ. The uninitiated might look inside an organ and see only mechanical mysteries. Many organs are damaged or compromised by uninformed storage of folding chairs and Christmas decorations within. But the organ is a complex machine whose inanimate character must disappear so as not to interfere with the making of music.
Musicians have intimate relationships with their instruments. In Violin Dreams (Houghton Mifflin Company, 2006, page 5), Arnold Steinhardt, first violinist of the Guarneri Quartet, writes, “When I hold the violin, my left arm stretches lovingly around its neck, my right hand draws the bow across the strings like a caress, and the violin itself is tucked under my chin, in a place halfway between my brain and my beating heart.”
No organist can claim such an affinity, not even with the tiniest, most sensitive continuo organ. Steinhardt refers to instruments that you “play at arm’s length.” More usually, the organist sits at a set of keyboards separated from the instrument by at least several feet, and sometimes by dozens or even hundreds of feet. And in the case of electric or electro-pneumatic keyboard actions, he is removed from any direct physical or mechanical connection with the instrument he’s playing. He might as well phone it in.
A pipe organ of average size is a complex machine. A thirty-stop organ has about 1,800 pipes. If it’s a two-manual tracker organ, there are 154 valves controlled by the keys, a system of levers (multiplied by thirty) to control the stops, a precisely balanced action chassis with mechanical couplers, and a wind system with self-regulating valves, along with any accessories that may be included. If it’s a two-manual electro-pneumatic organ, there are 1,800 note valves, 122 manual primary valves (twice that many if it’s a Skinner organ), and hundreds of additional valves for stop actions, bass notes, and accessories.
But the conundrum is that we expect all that machinery to disappear as we play. We work to eliminate every click, squeak, and hiss. We expect massive banks of expression shutters to open and close instantly and silently. We’re asking a ten-ton machine in a monumental space to emulate Arnold Steinhardt’s loving caress.
It’s a “one-off.”
Most of the machines we use are mass-produced. The car you buy might be the 755,003rd unit built to identical specifications on an automated assembly line. If there’s a defect, each unit has the same defect. But while individual components in an organ, such as windchest actions, might be standardized at least to the instruments of a single builder, each pipe organ is essentially a prototype—one of a kind. The peculiarities of an organ chamber or organ case determine the routes of mechanical actions, windlines, and tuning access. The layout of the building determines where the blower will be located, as well as the relationship between musician and machine.
The design of the instrument includes routing wind lines from blower to reservoirs, and from reservoirs to windchests. Each windchest has a support system: ladders, passage boards, and handrails as necessary to allow the tuner access to all the pipes. An enclosed division has a frame in which the shutters are mounted and a mechanism to open and close the shutters, either by direct mechanical linkage or a pneumatic or electric machine. Some expressive divisions are enclosed in separate rooms of the building with the expression frame and shutters being the only necessary construction, but others are freestanding within the organ, so the organbuilder provides walls, ceiling, access doors, ladders, and passage boards as required. The walls and ceiling are ideally made of a heavy, sound-deadening material so the shutter openings are the only path for egress of sound.
What’s in a tone?
Galileo said, “Mathematics is the language in which God wrote the universe.” While it may not be immediately apparent, mathematics is the heart of the magic of organ pipes. Through centuries of experimentation, organbuilders have established “norms” that define the differences between, say, flute tone and principal tone. The physical characteristics of organ pipes that determine their tone are defined using ratios. The “scale” of the pipe is the ratio of the length to the diameter. The “cut-up” that defines the height of a pipe’s mouth is the ratio of mouth height to the mouth width. The “mouth width” is the ratio of mouth width to the circumference. The type and thickness of the metal is important to the tone, so the organbuilder has to calculate, or guess, what material to use in order to achieve just the tone he’s looking for.
Finally, the shape of the pipe’s resonator is a factor. A tapered pipe sounds different from a cylindrical pipe, and the taper is described as a ratio of bottom diameter to top diameter. A square wooden pipe sounds different from a round metal pipe. A stopped wooden pipe sounds different from a capped metal pipe, even if the scales are identical. When comparing the scale of a wood pipe to that of a metal pipe, the easiest criterion is the area of the pipe’s cross section—depth times width of the wood pipe is compared to πr2 of the metal pipe. If the results of those two formulas are equal, the scale is the same.
The reason all these factors affect the tone of the pipes is that each different design, each different shape, each different material chosen emphasizes a different set of harmonics. The organbuilder, especially the voicer or the tuner, develops a sixth sense for identifying types of pipes by their sounds. He instantly hears the difference between a wood Bourdon and a metal Gedeckt, or between the very narrow-scale Viole d’Orchestre and the slightly broader Salicional. He can tell the difference between high and low cutup just by listening. Conversely, his intuition tells him which selections of stops, which types of material, what level of wind pressure will produce the best sounding organ for the building.
The keen-eared organist can intuit all this information. Why does a Rohrflöte 8′ sound good with a Koppelflöte 4′? You may not know the physical facts that produce the complementary harmonics, but if you’re listening well, you sure can hear them. Early in my organ studies, a teacher told me not to use a Flute 4′ with a Principal 8′. Fair enough. That’s true in many cases. But it might be magical on a particular organ. Ask yourself if a combination sounds good—if it sounds good, it probably is good.
The whole is greater than the sum of the parts.
If the organ is part machine and part mathematics, and the musician is physically separated from the creation of tone, how can it be musical or artistic? How can an organist achieve the sensitivity of a violinist or a clarinetist who have direct physical control over the creation of tone? If you don’t have a good embouchure, you don’t make pretty sounds.
While I’ve talked about mechanisms and the mystical properties of the sound of the pipes driven by their math, we’re still missing something. Without wind, we have nothing but a big pile of wood, metal, and leather. Wind is a lively, living commodity. It has character and life. It’s endlessly variable. Outdoors in the open climate, wind is capricious. Any sailor knows that. You can be roaring along with white water boiling from under your transom, sails and sheets taut, and suddenly you fall flat as the wind dies. Or it shifts direction a few points and instead of drawing you along, it stops you dead.
Inside our organs, we harness the wind. We use electric blowers that provide a strong steady supply of wind, we build windlines and ducts that carry the wind from one place to another without loss through leakage. We design regulators with valves that regulate the wind (we also call them reservoirs because they store the regulated pressurized air), and respond to the demands of the music by allowing air to pass through as the valves open and the speaking pipes demand it, and our windchest actions operate those valves as commanded by the keyboards under the hands of the musician.
When you’re sitting on the bench, or inside the organ chamber, and the organ blower is off, the whole thing is static, inanimate. It’s like the violin or clarinet resting on padded velvet inside a locked case. I’ve always loved the moment when the blower is turned on when I’m inside an organ. You hear the first rotations of the motor, the first whispers of air stirring from the basement, and a creak or two as reservoirs fill and the springs pull taut. Hundreds of things are happening. When the blower is running at full speed and all the reservoirs have filled, the organ is alive and expectant—waiting to be told what to do. And at the first touch of the keyboard, the music begins.
Defining the indefinable
Once we’re playing, we enter the world of metaphysics. Intellectually, we understand how everything is functioning, but philosophically, we can hardly believe it’s true. Combinations of stops blend to create tone colors that otherwise wouldn’t exist. Peculiarities of acoustics create special effects heard in one location, but nowhere else. The motion of the air is apparent in the sound of the pipes, not, as a wag might quip, because faulty balance or low supply makes the wind wiggle, but because that air is alive as it moves through the organ’s appliances.
It’s that motion of wind that gives the organ soul. This is why the sounds of an electronic instrument can never truly equal those of the pipe organ. Sound that is digitally reproduced and funneled through loudspeakers can never have life. The necessary perfection of repetition of electronic tone defies the liveliness of the pipe organ. Just like the mouth-driven clarinet, it’s impossible that every wind-driven organ pipe will sound exactly the same, every time it’s played. It’s the millions of nearly imperceptible variations that give the thing life.
This starts to explain how the most mechanical and apparently impersonal of musical instruments can respond differently to the touch of different players. I’ve written several times about our experience of attending worship on Easter Sunday at St. Thomas’s Church in New York, when after hearing different organists playing dozens of voluntaries, hymns, responses, and accompaniments, the late John Scott slid onto the bench to play the postlude. The huge organ there is in questionable condition and soon to be replaced, but nonetheless, there was something about the energy passing through Scott’s fingers onto the keys that woke the gale that is the organ’s wind system and set the place throbbing. It was palpable. It was tangible. It was indescribable, and it was thrilling.
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My friend Tony cared about his machines, not just because they were the tools with which he made his living, but because their inanimate whims responded to his understanding. We survived in that beguiling but drafty and imperfect house because as we loved it, we got to know it, and outsmarted most of its shortcomings. And I had lots of fun with that old Gravely, taking care of it, coaxing it to start, and enjoying the results of the mechanical effort.
Tony’s D-9 moved dirt—lots of dirt. But the sound of the organ moves me. And because I see it moving others, it moves me more. It’s all about the air.
