p. 34 of the Course Guidebook. The text is online here. Let me know if you want me scan page.
For example, the “Dance of the Adolescents”—the pounding, thumping episode that set off that opening night riot—is characterized by a single bitonal harmony that is literally drummed into the listener’s head. The harmony (or better, the sonority) consists of an E-flat dominant seventh chord heard over an E major triad.
He says this in Lecture 5 (CD no. 2), at 16 mins 15 seconds.
- I sold my music textbooks when I got M.Mus in 1996. But I can't find definition of "sonority" online. Oxford Dictionary of Music (6 ed.) doesn't define it. OED does, but its definition is too vague and abstract. What does "richness" or "depth" mean? "Loudness" already falls under dynamics. "resonance" is acoustics, and has nothing to do with harmony.