Musical ensemble

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A musical ensemble is a group of three or more musicians who gather to perform music.

There are several denominations of ensembles according to their size and composition.

The terms duet, trio, quartet, quintet, sextet, septet, octet, and nonet are used to describe groups of two, three, four, five, six, seven, eight, and nine musicians, respectively. In classical music, these arrangements are commonly referred to as chamber music. A common quartet is the string quartet, composed of two violins, a viola and a violoncello. The most usual string quintet is similar to the string quartet, but with the viola duplicated. In some cases, though, it is the violoncello that is duplicated. See: String trio, String sextet, string. A piano quintet is usually a string quartet plus a piano. Another fairly common grouping in classical music is the wind quintet, usually consisting of flute, oboe, clarinet, bassoon and horn.

In jazz, a fairly standard trio line up would consist of a rhythm section of piano, bass and drums. A quartet would typically add a horn (the generic jazz name for saxophones, trombones, trumpets, or any other wind instrument commonly associated with jazz) while larger ensembles would add further instruments. The lineup of jazz ensembles can vary considerably.

A group with more instruments is usually called an orchestra. A small orchestra is called a chamber orchestra. A symphony orchestra is a large body of several tens and often more than a hundred musicians, divided in groups of instruments: strings (including violins (I and II), violas, violoncellos, basses), woodwind, brass, percussion, and sometimes more. The description Philharmonic (from Greek philos: love) was originally used by amateur orchestras, distinguishing them from professional Symphony orchestras, but nowadays professional classical orchestras may use either term in their titles. A Sinfonietta usually denotes a somewhat smaller orchestra (though still not a chamber orchestra), and the terms concert or pops orchestra usually mean an orchestra concentrating mainly on the light classical and more popular repertoire.

In the 1900's, the Wind Symphony or Wind Ensemble became popular, especially in academic circles. A wind ensemble consists entirely of wind instruments and percussion instruments, but may also include stringed bass. Schools from elementary level onward often have a school band program which is usually centered around its wind ensemble, often known as a concert band.

A string orchestra has only strings, i.e., violins, violas, violoncellos and basses.

A quartet (string, wind etc.) is an ensemble of 4 players and is also the name for music written (e.g. by Mozart, Beethoven) for an ensemble of 4 players: Mozart's Clarinet Quintet is similarly a piece written for an ensemble consisting of 2 violins, a viola, a cello and a clarinet, the last being the exceptional addition to a "normal" string quartet.

A choir is a group of voices. Sometimes the group of similar instruments in an orchestra are referred to as a choir. For example, the woodwind instruments of a symphony orchestra could be called the woodwind choir.

A group that plays popular music or military music is usually called a band. Classical musicians colloquially refer even to the likes of the Chicago Symphony Orchestra as their band. Ensemble is most commonly used in the French language.

Other Western musical ensembles

Non-Western musical ensembles

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