In an outline of ca. 1949 for a never-written work on The History of German Music from 1908 to 1933, Adorno remarks that, when the Nazis took over, they hardly needed to suppress 'cultural-bolshevist' music - that is, 'new music', such as that of Berg or Schoenberg - because the suppression had already largely taken place within the realm of 'so-called new music' itself, so that 'certain late forms of new music (Weill's Bürgschaft) could be taken over almost unchanged by fascist composers (Wagner-Régeny)'. Adorno continues,

Understandably, many approaches to the philosophy of music or to musicology are liable to treat such statements with more than a hint of scepticism. Is it possible to legitimate an approach to music which thinks it is more likely, as Adorno claims in a related context, that one will arrive at historical insight by ‘a really technically strict interpretation of a single piece like the first movement of the Eroica that makes its discoveries transparent as discoveries about society’ than, for example, by looking at the broad history of musical styles or, indeed, at the social and economic conditions of musical production and reproduction?