Found these articles on early electro-acoustic composition from Cesar Bolaños, a Peruvian composer who went to Argentina and began to integrate early computers into his work. From a 21st century perspective, it’s interesting to see how the electroacoustic composers of the late 60s first came into contact with concepts we now take for granted.
(You’ll probably have to use Google Translate, but even if you don’t, the diagrams on the second article are aesthetically-pleasing)