Not sure if this is the sort of info that goes well on here - Been researching energy sound healing for a long time and thought you guys might like a brief history of this
From Pythagoras though to Tesla there have been healing frequencies used for thousands of years that have been suppressed by big pharma - now we can access these frequencies on our devices - without costing the earth !!
https://youtu.be/IW4H1gBWOuA