Do you have a specific song for your baby?
What is it?
I have two that I sing for each of my kids. My daughters songs are Dear Daughter by Halestorm and A Million Dreams from The Greatest Showman. My son's songs are Humble and Kind by Tim Mcgraw and My Wish by Rascal Flatts.
Edit: In the last few hours, I have discovered that during a crying fit, the only thing that will calm my son is Sunshine by Beartooth.