Her opponents in this discussion must be 21st Century couch potatoes.
Music proabably began as elaborated and decorated speech associated with various bodily activities of many types from hunting and gathering and foraging and gardening and childcare (lullabies), toolmaking , ritual dance , love courting. It wasn't likely making sounds disconnected to any other activiity
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I went back to reading Kenneally after a couple of week binge read political stuff on how rotten things are....
So, the point is that she outlines work done in a combination of studies in the origin and evolution of music and language and gives a brief description of several schools of thought.
While I was reading these sections, they reminded me of this music thread. What occurred to me is there are at least two classes of models on music. One follows a rhythm based model which is the one that Joanna prefers. The other model follows a melody or song or speech model. While Kenneally mentions the rhythm model, she chooses to focus on the song or poetry model. She's a linguist so she follows the speech end.
Music it turns out is as universal as language. Every culture has some form of music making. Through a variety of experiments and studies, it also turns out that languages sounds and music making sounds have a correlation to the 12 tone chromatic scale of sounds. In other words the sounds that make up language sounds are pretty much the same as those that make up music.
Then in a final note at the end of this chapter on Structure. she notes studies of babies and small children and the near universal response to music is some form of spontaneous motion, waving arms around in the air and/or little dance like steps. Then she cites other studies of the use of motherese to control the emotional states of babies by talking to them in sing-song fashion.
There are studies, considered as controversial that conclude cave bear bone was used to make flutes or a simple wind instruments...by guess who? Neanderthal. The instrument is a hollowed out piece of bone with holes drilled in it. Here's the wiki:
http://en.wikipedia.org/wiki/Divje_Babe_flute
CG