Goldman cite a doctor saying it is demonstrated that relaxing music is as potent as valium ...
I dont doubt it myself...
Anybody with stress crisis can test it himself...
A fact which is striking is a relatively high % of people are not moved by music, or are unable to produce it or a mix of the two. it is call amusia ...
For me i feel this as an handicap as much as others handicap...
Anyway i did not know but Goldman wrote a book about humming sound...
He was looking for a sound whch anybody can produce from babies to grandpa without any judgemental appreciation or preoccupation about the voice qualities : the humming sound....
For sure as he said Patanjali already described this sound AUM or OM as the fundamental home or humming of the cosmos itself...
Goldman remind us that a lot of peer reviewed research around the sound AUM or humming demonstrated all health beneficial effects on the metabolism or blood pressure and many other aspects...
Personally i like very much the music of Australian original people creating it with their voices and the powerful didgeridoo...Which is a humming sound ...The didgeridoo is probably the most powerful humming instrument with the human humming voice...