Example 22. Bernard Herrmann, “The Couch” (Sisters, [00:55:12–00:55:19]): (a) Herrmann’s polyharmony as the superimposition of four instrumental groups (b) Herrmann’s polyharmony as the superimposition of two half-diminished chords (c) The half-diminished motive in the “Prelude” [00:00:00-00:00:04]