21 trombones in the 21st century (a Tribute to Urbie Green)

A trombone ensemble (often called a trombone choir or trombone consort) is a homogeneous brass group built from the family of trombones—historically alto, tenor, and bass (and today sometimes contrabass)—that performs polyphonic, chorale-like, antiphonal, and fanfare textures. The sound world emphasizes warm, vocal-style legato and clear contrapuntal lines reminiscent of Renaissance and Baroque choral writing, but the format has expanded to include Romantic/modern concert works and jazz-oriented trombone sections and choirs. Typical sizes range from quartets (SATB-like) to larger choirs of 6–12 or more players, occasionally with organ, choir, or rhythm section.