Actually If you consider it sensibly, 1954 is a meaningless date in lots of ways. The revival actually started with the invention of the phonograph. That was when performances could be recorded, and allows people today to listen to songs/tunes how they were played then. Before that, It was either aurally transmitted (and changed) or just written down in some form or other.
So the Tradition died with Edison.
Everything after that is the Revival.