White noise for babies, do or don't?

Actually with the initial question I’d like to enquire on some more aspects of the child-raising inputs question.
What additions do you think are most nutritious to the developing mind (and personality), aside from those things which are obvious because natural requirements such as prompt genuine attention, affectionate physical contact, stimulating environments, etc.
Many extras are being questioned and experimented, such as “baby Mozart” music, white noise and whatever you may. But what of all might you outline as actually useful, approaching “necessary”? Or.. do any of these extras serve a valid purpose?
cheers