I hear the cooing sound, don't know it it's the mom or the baby. I also hear a similar sound that is more like a pigeon or turtledove.

About the kid sounds: We've had great fun the last couple of days with our female beagle-mix dog. I play the game on headphones so the racket doesn't bother the rest of the house. But the dog can hear when the kid yelps the high-pitched "Hey!" on being picked up. It's been hilarious watching mama dog searching for the baby. She'll sit in her RCA Victor pose with head tilted and floppy ears up, then put her paws on the desk and actively search for the kid whenever she hears the yelp. She doesn't react to any of the other sounds.