Mellisonant is an adjective that means pleasing to the ear. 

Coming from the Latin words for ‘honey,’ “(mel EESE) and ‘sound’ (SO noose) our word of the day has been used to describe sweet sounds since the early 17th century. Here’s an example:

That band’s mellisonant first album has been used in our home for over a decade. After all, what better way to put kids to sleep than to have sweet sounds echoed throughout the home.