Choir Hymn of Zarathustra for choir, op. 4 שְׁמַע יִשְׂרָאֵל for antiphonal choir, op. 12 The Hollow Men for choir, op. 29 Irreparable for choir and solo soprano, op. 15 Epilogue: Disordered and Flatulent, op.23 Lieder Celestial Gardens for mezzo soprano and piano quartet, op. 6 פֶּסַח, op. 17 Songs in chromatic keys, op.19 Gacela of the Dark Death for mezzo soprano, tenor, flute, clarinet, cello & electronics, op. 21 Opera The Summoning, op. 22 Animal Farm, 0p. 36