El Vinyl, CD & tapes from this label at Norman Records
If you feel you need a primer on the early electronic music of the 20th Century, you could do a lot worse than this compilation on El. All the biggest hitters are here: Karlheinz Stockhausen, György Ligeti, John Cage… And my personal favourite, Iannis Xenakis! Some very intense atmospheres here, each composer pushing up against the technological limits of the age. Crucial material.