The quote about the trip to the beach, and his description of his reverie during the musical performance are familiar to me - those are psychedelic experiences.

You could drop acid and take a walk on the beach and see the ocean that way and feel those things and cry about it. You could get stoned and put on your favorite album and slip into a vivid daydream, directed by the music as a soundtrack.

I wouldn't call them psychedelic per se, or even really a "Jhana" requiring deep concentration. Feeling joy as a result of focusing on something beautiful/interesting is just a fundamental part of being human.

I agree with the author that intense focus can make something more mundane feel special, like intensely focusing on the act of eating an apple, but being moved by walking on a beautiful beach in the evening seems almost expected?

I did do mushrooms frequently at a young age (like a couple times a month from 16-18) so maybe that tweaked something in my brain, but I feel like I slip in "Jhana" all the goddamn time haha. I was tearing up staring at the trees blowing outside while waiting for my dentist a couple days ago.