Culled from recordings in 1958/9 and published in German in 2009, the lectures (Polity: 2018) are reviewed by Lydia Goehr (Columbia University) in NDPR. Goehr notes:
[The lectures on aesthetics] are indispensable because they show the workings of aesthetic theory in philosophy more generally, when, whatever the topic, philosophy shows itself willing to submit to its own immanent critique against its positivistic tendency to discipline its thought through too pure an engagement of logic or reason. To discipline thought, for Adorno, is to erase what cannot be contained by the logic of achieved concepts: the mimetic trace or aesthetic movement that sustains the ongoing and open labor of thinking. When this movement is excluded, concepts tend to become closed off from all that gives thought its particularity, contingency, and historicity, even, we are told, its expressivity and life. He writes of the closure as a pyrrhic victory: the concepts seem clarified but dialectically they only affirm the tendencies toward complacency, rigidity, and regression in the society at large.