John Cage and Morton Feldman in Conversation, 1967

From archive.org:

This first of a three part conversation between John Cage and Morton Feldman was recorded at WBAI in New York between October 18-25, 1967. The segment begins with Cage and Feldman discussing the various ways people perceive intrusion in their lives. The composers then spend some time on the occupation of the artist as "being deep in thought," and what the goals or purposes of "being deep in thought" might be. A brief analysis of Black Mountain College follows before Cage and Feldman return to the idea of being in thought, and the role of boredom in life. The conversation ends with Cage explaining his hesitation towards taking on students.

Great stuff, one of three recordings, not only two of the greatest minds of the time under one roof, but two of the greatest voices - Cage with his distinctive, high pitched, almost floating voice, and Feldman, with his heavy New York accent that sounds more like the plumber next door than one of the greatest composers of the 20th century.