Does your baby have music and/or white noise all night long?

I’m reading a book about helping children sleep better and one of the recommendations is to have music or white noise on all night. The reasoning is that when they wake during the night, they are able to fall back asleep independently because they have the same environment as when they initially fall asleep.

Our son has a light up turtle that plays music/white noise. We put it on when we lay him down for bed, but it turns off after 15 min or so. We’re going to move him into his crib/own room soon, so I’m wondering if we should have a machine that stays on all night.