Euphony
/ˈjuːfəni/
Definition 1 of 1
Pro Tip 1/3Pleasing Sound
Euphony is about a smooth, pleasant sound; it's like music made by words. 
Her speech was pure euphony, with every syllable flowing like a gentle river.
Pro Tip 2/3Poetry & Prose
Euphony is often found in poetry, but don't forget it can enhance prose too. 
The euphony in his novel made the descriptions come alive with a lyrical rhythm.
Pro Tip 3/3Emotional Effect
Euphony can stir emotions; it doesn't just sound good, it makes you feel good. 
The euphony of her lullaby soothed the baby into a peaceful sleep.