The part calls for a solo violin, two oboes, two flutes, one English horn, E-flat clarinet, bass clarinet, bassoon, contrabassoon, horn, percussion, two harps and strings.
Other members of the clarinet family include the E-flat clarinet, known for its bright and piercing sound; the bass clarinet, with its deep, rich timbre; and the contrabass clarinet, which produces the lowest pitches of the clarinet family.