If you don't know this music, it is that of one of the legendary rappers of all time. He was shot to death several years ago and his murder has yet to be solved.
However, his music remains, and apparently this little baby can't live without it:
Notorious B.I.G. calms down crying baby
My kids used to calm down when we put them in the car seat on top of the dryer when we turned it on - even if there were no clothes to dry - or when we drove them around late at night.