Binaural beats have existed for around a hundred and seventy yrs, to get actual. Found by Heinrich Wilhelm Dove in 1839, but by no means used. Having said that, in 1973 Gerald Oster released an report in Scientific American entitled "The Auditory Beats in the Brain." This has opened https://andersonpbchy.total-blog.com/theta-frequency-7hz-deep-meditation-to-manifest-abundance-38092994