It goes way beyond that too.
Back then, recording studios were run by old guys in white lab coats who worked from 9 to 5. The whole recording process was a mystery to musicians.
The Beatles changed everything by basically taking over the studio and doing things themselves, recording, mixing and mastering their own songs. (with George Martin's help of course)
Later they utilized a simple 4 track recorder to to do multiple overdubs and other experiments. (ie, Sgt. Pepper)