Understanding the Fundamentals of Music (2006), by Robert Greenberg, B.A. in music (magna cum laude) from Princeton, Ph.D. in music composition from the University of California, Berkeley. p. 27 of the Lecture Transcript.
Apologies! I scanned the whole page just for context and to ward off rude comments asking for more context. I'm not asking anyone to read all of it.
What's the tonic in the first half of "Dance of the Girls" in The Rite of Spring (1912)? Greenberg doesn't say what it is. I listened to it the first time 15 years ago, and I always thought this movement was bitonal and had no tonic.
How is this tonic asserted, "sustained and/or repeated for so long that it becomes, by sheer dint of tis assertion, the gravitational center"?