The following web page contains a video interview with Electronic Music pioneer, Milton Babbit. He explains, and shows examples of:
- Reel-to-Reel tape music (and explains briefly how it was done),
- Computer music and that it was created by punching holes in the computer’s Paper Tape (the actual “program” or “software” for the computer),
- Synthesizers
Mr. Babbit presents several examples of various types of Electronic Music.
Here’s the link:
https://www.synthtopia.com/content/2020/03/31/milton-babbitt-on-electronic-music-1966/