(Have been meaning to write about it for ages as I had a big interest since the early 90's).
In this video utilizing SunVox Pavel Ti have been creating these sounds and I do not know how exact he is when it comes to frequency spectrum affecting the brain as have not listened to it on head phones yet but the visuals he coaxes out of SunVox are amazing and all created using the built in oscilloscope that all the SunVox modules have built into them.
Highly recommendable watch.