When books or pictures in reproduction are thrown on the market cheaply and attain huge sales, this does not affect the nature of the objects in question. But their nature is affected when these objects themselves are changed rewritten, condensed, digested, reduced to kitsch in reproduction, or in preparation for the movies. This does not mean that culture spreads to the masses, but that culture is being destroyed in order to yield entertainment.
The result of this is not disintegration but decay, and those who actively promote it are not the Tin Pan Alley composers but a special kind of intellectuals, often well read and well informed, whose sole function is to organize, disseminate, and change cultural objects in order to persuade the masses that Hamlet can be as entertaining as My Fair Lady, and perhaps educational as well. There are many great authors of the past who have survived centuries of oblivion and neglect, but it is still an open question whether they will be able to survive an entertaining version of what they have to say.