larger vocal forces, such as a choir. Brahms and Schubert wrote numerous pieces for four voices that were once popular in private salons, although they are seldom performed today. Vocal quartets also feature within larger classical compositions, such as opera, choral works, and symphonic compositions. The final movement of Beethoven's Ninth Symphony and Giuseppe Verdi's Messa da Requiem are two examples of renowned concert works that include vocal quartets. Typically, a vocal quartet is composed of: Soprano, alto (or mezzo-soprano), tenor, and bass (or baritone), for mixed ensembles; or 1st tenor, 2nd tenor, baritone, and bass, for male groups; or 1st soprano, 2nd soprano, mezzo-soprano, and contralto, for female groups; or Tenor, lead, baritone, and bass, for barbershop style (both male and female). Baroque quartet The baroque quartet is a form of music composition similar to the trio sonata, but with four music parts performed by three solo melodic instruments and basso continuo. The solo instruments could be strings or wind instruments. Examples of baroque quartets are Georg Philipp Telemann's Paris quartets. Jazz Quartets are popular in jazz and jazz fusion music. Jazz quartet ensembles are often composed of a horn, classically clarinet (or saxophone, trumpet, etc.), a chordal instrument (e.g., electric guitar, piano, Hammond organ, vibraphone, etc.), a bass instrument (e.g., double bass, tuba or bass guitar) and a drum kit. This configuration is sometimes modified by using a second horn replacing the chordal instrument, such as a trumpet and saxophone with string bass and drum kit, or by using two chordal instruments (e.g., piano and electric guitar). Popular music Rock and pop The quartet lineup is also very common in pop and rock music. A standard quartet formation in pop and rock music is an ensemble typically consisting of a vocalist, an electric guitar, a bass guitar, and a drum kit. This configuration is sometimes modified so that the vocalist also plays guitar, or sometimes a keyboard instrument (e.g., organ, piano, synthesizer) or soloing instrument (e.g., saxophone) may be used. Vocal quartet In the 20th century Western popular music, the term "vocal quartet" usually refers to ensembles of four singers of the same gender. This is particularly common for barbershop quartets and Gospel quartets. Some well-known female US vocal quartets include The Carter Sisters; The Forester Sisters; The Chiffons; The Chordettes; The Lennon Sisters; BLACKPINK the South Korean girl group; and En Vogue. Some well-known male US vocal