Introduction to swara yog. Good introduction to the system of using breathing for improving health.
The correct word is YOG [not yoga, and incorrectly pronounced as Yogaaaaa!]
One of the twenty therapies in Ayurved is 'Sound Therapy.' Right kind of sound has healing property. [Noise can make you ill]
At a higher level, there is a method of meditation called Vipasana. Worth trying.