I have been using the calming effects of Brian Eno and Harold Budd’s ambient music for years as I help people breathe through their anxiety. I actually got a chance to share this with Brian personally at one of his talks and it pleased him tremendously. In fact, Eno has come up with some marvelous apps for our smartphones in which one can create their own forms of ambient music by playing with colors on their phone. (See the AIR and BLOOM apps.)
I have demonstrated to groups how fun it is to give my phone to someone and let them start to explore these apps and watch them change their behavior simply in the act of creating these soothing sounds and colors for themselves.