I live over in Japan and there's a song here that became famous a few years ago because the moment you play it babies completely stop crying.
POISON / Takashi Sorimachi
I've got a new born - not even 2 weeks old yet so I can't testify for older babies but it's currently effective for us (hubby and me) - although we've also resorted to driving her once 🤣.
We're finding it really funny - but on a serious note I thought I'd put it up on here in case it's useful for anyone else.
If it is, can you please let us know!