As I am quite fond of physics and astronomy I decided to read this chapter first, not because it was first in the book, but because I found it most interesting after taking a quick look at the table of contents.
I like the comparisons to our own universe, the idea of the primordial music still existing.
However, one crucial point escapes Mrs. Larsen - which given the fact that she is a physicist surprises me - namely string theory. Why? Because the idea of string theory fits in perfectly with the concept of the world being created by music, by resonating strings in the 11th dimension.
To best understand this concept, I strongly recommend watching these four videos on YouTube by leading string theorist and futurist Michio Kaku:
1.
http://www.youtube.com/watch?v=ZnQLsERqTIg
2.
http://www.youtube.com/watch?v=MMG7LA4Rsq8
3.
http://www.youtube.com/watch?v=NOzP6XhtAXo
4.
http://www.youtube.com/watch?v=Du0LqsBe_iw
Especially part three explains it well: "we believe the mind of God is music resonating through ten dimensional hyperspace".
That really sounds a lot like the primordial music of Eru. You can also establish the connection to the Ainur and Melkor, other strings produced negative objects in our universe.
And what is also nice is the possible link to the theme to come creating Arda Unmarred. As Mr. Kaku explains in the fourth part, string theory may not help us out a lot right now, but it could save the human race and even the entire universe from extinction at a certain point. As the universe cools down - as also explained by Mrs. Larsen - we will need to find a way to create a new universe in which to live in, to decrease entropy significantly, and for that we could very well need string theory, we would need to "play" our own strings to save ourselves.