Pre-ignition in 1966 with Blonde on Blonde, Revolver and Pet Sounds.
With honourable mentions for Aftermath, Freak Out, Fresh Cream, and many others. Are You Experienced? surprisingly doesn't quite make it. Recorded in 1966.
Paul
And the initial trigger for all the 66/67 stuff was Dylan's Like A Rolling Stone. Its length and style broke the contraints of 3 minutes plus guitars/drums that was pretty much the norm until then. But most important were the lyrics. Pre LARS it was mainly boy/girl stuff. Afterwards, you could write about anything and everyone did.
I still distinctly remember the first time I heard LARS on its release in 65. It was utterly stunning, given the stuff we were used to then (even from the Beatles/Stones etc).
Malc