Greetings;
I've used a few different brain synchronization tools to deepen meditation; including Centerpoint, Synchronicity, Brainsync and Monroe Institute's Hemi-sync.
By far the most powerful I have found is the Monroe Institute tool.
The Monroe Institute originally developed the binaural pulse technology and holds the patent. There is simply something *different* about thier audio technology. I have had much more profound results with their tools than any of the others, and without all of the hype and cultish baggage found in some of the other programs. Robert Monroe has been highly respected for many years for his work in human potential and the mind.
You can access information about their tools at http://www.hemi-sync.com
