"Soft lullabies" refers to gentle and calming songs or melodies that are usually sung or played to help someone fall asleep or feel relaxed. Full definition
Singing soft lullabies gently when holding your baby is a good alternative, too. (newkidscenter.com)
It facilitates bonding time between baby and parent, and soft lullaby music has been shown to calm and soothe both adults and babies,» says Roth. (care.com)
This can be anything from soft lullabies, to a blanket, to lavender essential oils (good for calming) in a diffuser — it just has to be something that is only used during sleep time. (clarkscondensed.com)