>> find an old recording of Haitian voodoo drums give it a listen using good headphones with your eyes closed, and after about twenty minutes you will enter an altered state
I followed your trance recipe to the letter and soon entered a state of mind that on this day was novel to me. It seriously made me happy to be alive and to be human. However, that feeling didn't linger. Now I'm back to my usual miserable self, a blob of cells that all try but mostly they fail to communicate with each other in a way that is pleasant for the vessel, me. I don't think I was in a trance. Perhaps I should have danced.
I'm very intrigued, though, by the idea of rhythm being a protagonist ingredient of "flow". I'm a programmer, musician only by heart, but on Wednesdays instead of instruments I play the rhythmic game of tennis. One time me and my brother, two racket-throwing outwards-acting tennis brats in need of anger management therapy both entered "flow" at the same time and it lasted a good hour and a half. In the middle of our match a large group of youngsters, perhaps thirty individuals, entered the yard and became our audience. They started to discuss our game. They correctly dismissed us as being "not top notch". They chit-chatted. They said this and that. They were merely meters away from us but acted like they were watching TV and that e could not possibly hear them. After the game we both said: were you ever bothered by the ruckus? We concluded that no, we weren't but that we could still paraphrase almost all of the comments we've heard from the audience. But during the game it seemed to us that nothing could get us out of the state of flow. In fact, neither of us understood we were in the flow state until the ruckus began.
This was an out-of-mind, out-of-body and out-of-this-world experience for me that I have not been able to reproduce since. I was untouchable and I loved it.