I was curious about this, so I asked my friend Gustav Zillmän, who is a well known HiFi-guru in local circles, what I should do. He told me that small entities of noise are called noisette, and the best way to apply them to my system is to buy them in form of Creme de Noisette, which can be carefully applied to speaker binding posts to achieve the desired effect.What's more, with modern production techniques music can very well be too clean. To the point of being unpleasant. Adding noise and little background things to "fill the void" is standard. Sometimes not even subtle. The "pad" sound category is there for "filling emptiness" by definition even.