Bassoon

The bassoon is a musical instrument in the woodwind family, which plays in the tenor and bass ranges. It is composed of six pieces, and is usually made of wood. It is known for its distinctive tone color, wide range, versatility, and virtuosity. It is a non-transposing instrument and typically its music is written in the bass and tenor clefs, and sometimes in the treble. There are two forms of modern bassoon: the Buffet (or French) and Heckel (or German) systems. It is typically played while sitting using a seat strap, but can be played while standing if the player has a harness to hold the instrument. Sound is produced by rolling both lips over the reed and blowing direct air pressure to cause the reed to vibrate. Its fingering system can be quite complex when compared to those of other instruments. Appearing in its modern form in the 19th century, the bassoon figures prominently in orchestral, concert band, and chamber music literature, and is occasionally heard in pop, rock, and jazz settings as well. One who plays a bassoon is called a bassoonist.

The word bassoon comes from French basson and from Italian bassone (basso with the augmentative suffix -one), both terms that refer to the version of any instrument in a bass register. The term for bassoon used in classical music scores and parts is often its Italian name fagotto (plural fagotti), which referred initially to the dulcian. This word, adopted in many other European languages as fagot, fagote, or in German, Fagott, comes from an Old French word meaning a bundle of sticks.

The range of the bassoon begins at B♭₁ (the first one below the bass staff) and extends upward over three octaves, roughly to the G above the treble staff (G₅). However, most writing for bassoon rarely calls for notes above C₅ or D₅; even Stravinsky's opening solo in The Rite of Spring only ascends to D₅. Notes higher than this are possible, but seldom written, as they are difficult to produce (often requiring specific reed design features to ensure reliability), and at any rate are quite homogeneous in timbre to the same pitches on the cor anglais, which can produce them with relative ease. French bassoon has greater facility in the extreme high register, and so repertoire written for it is somewhat likelier to include very high notes, although repertoire for French system can be executed on German system without alterations and vice versa.

The extensive high register of the bassoon and its frequent role as a lyric tenor have meant that tenor clef is very commonly employed in its literature after the Baroque, partly to avoid excessive ledger lines, and, beginning in the 20th century, treble clef is also seen for similar reasons.

Like other woodwind instruments, the lowest note is fixed, but A₁ is possible with a special extension to the instrument—see "Extended techniques" below.

Although the primary tone hole pitches are a pitched perfect 5th lower than other non-transposing Western woodwinds (effectively an octave beneath English horn) the bassoon is non-transposing, meaning that notes sounded match the written pitch.

The bassoon disassembles into six main pieces, including the reed. The bell (6), extending upward; the bass joint (or long joint) (5), connecting the bell and the boot; the boot (or butt) (4), at the bottom of the instrument and folding over on itself; the wing joint (or tenor joint) (3), which extends from boot to bocal; and the bocal (or crook) (2), a crooked metal tube that attaches the wing joint to a reed (1) (listen^ⓘ).

The bore of the bassoon is conical, like that of the oboe and the saxophone, and the two adjoining bores of the boot joint are connected at the bottom of the instrument with a U-shaped metal connector. Both bore and tone holes are precision-machined, and each instrument is finished by hand for proper tuning. The walls of the bassoon are thicker at various points along the bore; here, the tone holes are drilled at an angle to the axis of the bore, which reduces the distance between the holes on the exterior. This ensures coverage by the fingers of the average adult hand. Playing is facilitated by closing the distance between the widely spaced holes with a complex system of key work, which extends throughout nearly the entire length of the instrument. The overall height of the bassoon stretches to 1.34 m (4 ft 5 in) tall, but the total sounding length is 2.54 m (8 ft 4 in) considering that the tube is doubled back on itself. There are also short-reach bassoons made for the benefit of young or petite players.