I've got a magazine article right here (The Week, Nov. 20, 2020) which says that UCLA did a study where 144 babies were monitored as they listened to lullabies from cultures not their own.

"Whether the youngsters heard a Hopi lullaby sung by a man or a soothing tune that the Ona people of Patagonia use to calm babies, the effect was the same:

slower heart rate
smaller pupils
electrical activity in skin declined
in other words, they chilled out.
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I find this interesting, but it's getting late. Discuss.