Here is the most salient point in Dialectic of Pop:
The art of pop music is separate from other musical arts by its aetiology: Where other forms of music are made to be performed live, pop music is made primarily to be recorded and distributed. Other works of musical art can be mixed and recorded, but the classical composition (transmitted by score) or the folk song (transmitted orally) are not made with this in mind.
By virtue of its purpose, the skills of mixing and recording are just as influential as performance and composition on the finished art of a pop song, and the recording/mixing of a single performance is captured and transmitted near-perfectly in itself, rather than being performed again with each listening. The popular Irish proverb of "the same tune is never the same tune twice" does not apply to pop music. This puts it in the same league as photography or cinema, which are separated from their pre-industrial counterparts (painting and theatre) by their mechanical natures which allow the photo to be reproduce and transmitted near-perfectly ad infimum, and thus place greater emphasis on perfecting the exact moment of capture.
This is the main crux of "Dialectic of Pop," and while it is a very interesting one, it is explained at the very beginning of the book. The rest of the book feels like an extravagant history of the pop music industry from the French perspective, and a series of awkwardly shoe-horned references to philosophical and cultural touchstones of Franco-German acadaemia.
Like her academic compatriots, Gayraud falls into the old trap of writing a book far too long with some interesting but scarce points here and there, which the author feels the need to justify by invoking the sacred names of esteemed academics and philosophers before her (such as Adorno and Nietzsche), as if to use her display of cultural capital to justify her own opinions. What could have been an interesting, accessible, and simply better book was weighed down by the need to defend its own existence within a thick layer of academic obscurantism, typical of continental writers in her field.