A brass quintet is a chamber ensemble composed of five brass instruments. Today the most common instruments are two trumpets, a french horn, a trombone and a tuba or a bass trombone. However, the instruments can vary depending on the type of quintet, for example replacing the horn with an additional trombone or replacing the trombone with a euphonium. Although the first brass chamber music was composed during the second half of the nineteenth century, coinciding with the development of brass instruments that could play chromatically, it was not until around the middle of the twentieth century that the brass quintet became a well established form of chamber music.