You're going to have to prove yourself wrong, Jeff.

Really, I think the whole emphasis on "deep" in terms of brainwave patterns is pretty (for the sake of word-play) shallow. There's more to it than that, I think.

I do not think that profound "deep" experiences all share the delta brainwave in common. There is no science I know of to back me up here, just a guess.

I have found zazen to bring me deeper in terms of intensity. Who was it that wrestled with an angel? Ezekiel? Well, that's what zazen was like for me. In a sense, the depth of that experience was way more than what I experienced through any other technique.

I have read several places that the binaural beat frequency does not always bring the brain into the same state as the difference between the two tones. Does holosync really bring the majority of the brain down into 2 hertz?

Is that what is considered "deep"? Is that beneficial? I don't think we know enough about the brain to really comment on that. I mean, I suspect even neurologists wouldn't be able to comment on that.