The full choral arrangement in 5 parts.
The Mixed voices have the main melody which corresponds to the Piano part in the instrumental recording.
The men's part corresponds to the Harp, the voices 1 to the Oboe, the voices 2 to the Viola and the women's to the Celesta.
The parts could enter as they do in the instrumental recording:
Mixed (piano), Voices 1 (oboe), Voices 2 (viola) and Women (celesta).