Bill Harris, director of Centerpointe Research Institute, has a product called Holosync that has been on the market for close to 20 years. Holosync is an audio technology on CD that is listened to with headphones.
He says that one of the benefits of listening is an increased ability to handle whatever is "coming at you", in other words, an increased ability to handle stress.
In my experience with Holosync, I am definitely calmer than I used to be. As well, things that used to upset me a great deal, do not upset me nearly as much. So, in that sense, Bill was correct.