Title: Chamber Music | Music Appreciation
Headings: 
Chamber Music
Musical Ensemble
Classical Chamber Music
Duets
Listen: Duet
Trio
Listen: Trio
Quartets
Strings
Listen: Quartet
Wind
Quintets
Listen: Quintet
Sextet
Listen: Sextet
Septet
Choral Groups

Content: thus one speaks of the “woodwind choir” of an orchestra, or different “choirs” of voices and/or instruments in a polychoral composition. In typical eighteenth- to twenty-first-century oratorios and masses, chorus or choir is usually understood to imply more than one singer per part, in contrast to the quartet of soloists also featured in these works. Choirs can sing with or without instrumental accompaniment. Singing without accompaniment is called a cappella singing (although the American Choral Directors Association discourages this usage in favor of “unaccompanied,” since a cappella denotes singing “as in the chapel” and much unaccompanied music today is secular). Accompanying instruments vary widely, from only one to a full orchestra; for rehearsals a piano or organ accompaniment is often used, even if a different instrumentation is planned for performance, or if the choir is rehearsing unaccompanied music. Choirs can contain all male (tenors, baritones, basses) or female (sopranos and altos) voices or be, soprano, alto, tenor, bass sometimes called SATB. CC licensed content, Shared previously
Quartet. Provided by: Wikipedia.