Here’s a podcast on the history of electronic music, suitably called A History Of Electronic Music.
I remember first listening to this podcast from Paul Sheeky years ago. In a series of episodes he charts some of the technology and movements. I returned to it recently spurred on by the work of Chris Beckstrom and the Melbourne Electronic Sound Studio (not that I have been). Along with the compilation OHM: Early Gurus of Electronic Music and the documentary Synth Britannia, this podcast is a great resource for appreciating the history associated with electronic music.