Before the Orchestra Begins, the Oboe Gets One Note

Before an orchestra plays anything by Beethoven, Beyoncé, or a composer born last Tuesday, it usually performs one very old piece: a single A. The hall has been full of scattered scales and bright little fragments. Then the concertmaster stands. An oboe sends out one narrow, unmistakable note, and the noise gathers around it. Strings answer. Winds answer. Brass answer. For a few seconds, dozens of specialists agree to become one instrument. The obvious question is why the oboe gets to make the offer. A popular answer is that the oboe is exceptionally stable. Another is almost the opposite: the oboe is difficult to tune quickly, so everyone else has to meet it where it is. Both explanations contain something useful, but neither turns the custom into a law of nature. The oboe became the orchestra’s reference through a mixture of history, audibility, and practical inconvenience. Early orchestras of the late 1600s were largely built around strings. Oboes sometimes reinforced violin lines and soon acquired independent parts of their own. Their sound was bright enough to be heard through a growing group of string players, and their pitch was more dependable than the gut strings then in use. They were also commonly present. A reference instrument is not much help if it has the evening off. The instrument’s construction helped fix the arrangement. An oboe makes sound when air sets two thin pieces of cane vibrating against each other. That double reed gives the instrument its concentrated tone, but it also makes pitch adjustment a delicate business. Yamaha’s instrument guide notes that an oboist cannot simply change pitch by sliding a barrel, as a clarinetist can, or by turning a tuning peg, as a violinist can. Meaningful adjustment often involves the reed itself: its length, width, scrape, or position. This does not mean an oboe is incapable of playing sharp or flat. It certainly is. Nor does it mean every oboe wakes up each morning at a cosmically ordained frequency. Reeds react to conditions, players compensate, and instruments warm during use. The better way to put it is that an orchestra traditionally organizes itself around the oboe because the note is conspicuous, the instrument has long occupied the right place in the ensemble, and last-second mechanical adjustment is limited. The ritual also reveals how surprisingly mobile musical pitch can be. Temperature and humidity affect instruments. Strings stretch and settle. Wind instruments change as the air column and instrument warm. Mutes can alter pitch slightly. An orchestra is not a cabinet of calibrated rulers; it is a temporary weather system made of wood, metal, cane, gut or synthetic strings, breath, and hands. So the tuning A is less a declaration than a local agreement. Many modern orchestras use an A near 440 hertz, meaning 440 vibrations per second, while some favor a slightly higher pitch such as 442. If a fixed-pitch instrument such as a piano or organ is involved, that instrument may settle the matter first, because it cannot be conveniently retuned between the overture and intermission. The oboist then carries that pitch to everyone else. Why A? Every instrument in the orchestral string family has an A string, making it a practical common denominator. The concertmaster—the first-chair violinist who acts as a liaison between conductor and ensemble—typically initiates the process. Depending on the orchestra, sections may tune in groups rather than all at once. What sounds to the audience like a splendid swarm is actually orderly traffic. Electronic tuners have not made this obsolete. A device can tell each player whether a note matches a numerical target, but an orchestra must do more than assemble individually correct readings. Musicians need to hear the same pitch in the same room, after their instruments have warmed, and adjust to one another. Acoustic tuning also exposes interference beats: the audible pulsing produced when two nearly matching frequencies meet. As the notes converge, the pulsing slows and disappears. And the oboe is not sovereign everywhere. If a score has no oboe, another wind instrument may give the note. A string-only ensemble can tune from the concertmaster. Concert bands often use B-flat because it lies naturally on many band instruments. The custom is a tool, not a monarchy. Still, it survives because it does several jobs elegantly. It checks the machinery. It gives players a final shared reference. It draws a clean boundary between the sociable disorder before the concert and the attentive silence after it. The conductor has not yet lifted a baton, but the room has already changed state. That lone A is often described as the orchestra getting “in tune.” More precisely, it is the orchestra deciding what “in tune” will mean here, tonight, under these lights, with this reed and these strings. The first act of a performance is not expression. It is agreement.