The Beatles heavily used alcohol and tobacco too. But really, they were three of the century's most talented and most hardworking musicians with incredible managers and producers and almost unlimited resources.

I can't prove it, but I don't believe there is a causative link between tripping on LSD and writing great music. I do believe there is a causative link between working hard and practicing a lot and writing great music.

For the record, Bob Dylan was baptised in the 70:ties. And if you believe LSD influenced the Beatles, then by the same logic, Jesus influenced Bob Dylan.

On the other hand, there is substantial evidence that LSD changed the Beatles' music qualitatively. They first took the drug in summer 1965. Their next album, Rubber Soul, written and recorded in fall and winter 1965 was a major stylistic shift.

Any interview with John Lennon will tell you as much, too.

The Beatles most transformative drug experience (one that goes hand-in-hand with "working hard") was arguably speed. [1]

1: http://blogs.villagevoice.com/music/2014/08/the_drug_that_he...

I can think of three ways LSD might influence music production:

1) LSD can cause synesthesia, especially music related synesthesia, which can definitely influence the creation of music in my experience.

2) It can be incredibly inspirational and emotive.

3) It can allow you to explore subconscious worlds and use previously inaccessible information.