Ensemble consisting of two violins, viola, and cello, or a work written for such an ensemble. Since circa 1775 such works have been perhaps the predominant genre of chamber music. It was principally developed (if not quite invented) by Joseph Haydn, who wrote some 70 quartets between 1757 and 1803. Wolfgang Amadeus Mozart, Ludwig van Beethoven, Franz Schubert, Béla Bartók, and Dmitry Shostakovich are the preeminent subsequent quartet composers. Works called string quartets have traditionally observed the four-movement design of the sonata and symphony. Like most chamber music genres, quartet music was traditionally intended primarily for the private enjoyment of amateur musicians rather than for public performance.
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Popular vocal ensemble consisting of four unaccompanied male voices. The voice parts are tenor, lead, baritone, and bass, with the lead normally singing the melody and the tenor harmonizing above. The emphasis is on close harmony, synchronization of word sounds, and variation of tempo, volume, diction, and phrasing. Barbershop apparently originated in the U.S. in the late 19th century, when American barbershops formed social and musical centres for neighbourhood men, though the term may derive from “barber's music,” the British term for an extemporized performance by patrons waiting to be shaved and referring to a barber's traditional role as a musician.
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One of the early composers of string quartets, Luigi Boccherini, wrote 100 string quartets. Other important composers of string quartets include Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven. The term "quartet" is also used to refer to a musical composition written for such a group. In string quartets, each player is typically given an allowing distinct part.
Yet another type of Western art music quartet is the "Saxophone Quartet", consisting of Soprano Saxophone, Alto Saxophone, Tenor Saxophone and Baritone Saxophone or (SATB). Often a second alto may be substituted for the Soprano part (AATB) or a Bass Saxophone may be substituted for the Bari. The groups usually perform a mix of classical and jazz. Saxophone Quartet literature is limited. Most of the traditional style classical sheet music is transcribed from string quartet charts. Saxophone Quartets are rare, most are assembled for performance studies at music colleges and the public never gets the chance to hear their unique sound. You can hear them on occasion if you listen to NPR news in the US.