So much ‘food’ for the musical, literary, soul….here’s just a smattering of all kinds of stuff:

The fantastic ‘radio happenings’, discussions between John Cage and Morton Feldman:

https://archive.org/search.php?query=john%20cage%20and%20morton%20feldman

A great collection of recordings and interviews from the Other Minds series. https://archive.org/details/other_minds

http://www.ubuweb.com  A fantastic collection of everything avant-garde.

The complete writings of Gertrude Stein: https://monoskop.org/media/text/stein_complete_writings/

https://archive.org/

Great site on everything Feldman http://www.cnvill.net/mfhome.htm  

Video game sounds: https://www.soundsnap.com/tags/video_game?page=1

Found home recordings and other tape deck oddities: http://www.sweetthunder.org/tapes/weekninety.html

https://www.youtube.com/watch?v=HyTpu6BmE88