E-flat clarinet
The work is scored for SAB choir and an orchestra comprising two flutes (2nd doubling piccolo), three oboes (1st doubling cor anglais), three clarinets (1st doubling E-flat clarinet, 3rd doubling bass clarinet), three bassoons (3rd doubling contrabassoon), four horns, three trumpets, three trombones, tuba, harp, piano (doubling synthesizer), four percussionists, and strings.