Compositions for trombone

symphony by Hector Berlioz

thumb|Page 1 of "Drei Equale für vier Posaunen" ("Three Aequales for four Trombones") by [[Ludwig van Beethoven]] An equale or aequale (from , equal voices or parts) is a musical idiom. It is a piece for equal voices or instruments. In the 18th century the equale became established as a generic term for short, chordal pieces for trombone choirs, usually quartets or trios. The instruments were not necessarily equal in pitch, but formed a closed consort.

composition by Francis Poulenc