Euphonious

In the evening quiet, we enjoy the song of the euphonious nightingale.

Source: tatoeba (4833320)

Before I ſet forward on my travels, I choſe to change my name from Collier to Coglioni or Collioni, as more euphonious; […]

Source: wiktionary

We think it difficult to copy more successfully a model so curiously polished as the Botanic Garden; to assemble ideas more luxuriously elegant; to annex epithets more unexpectedly apposite: or to harmonize couplets more imitative and euphonious.

Source: wiktionary

I know our theatrical managers, major and minor, are very particular in selecting euphonious titles for their melodramas, especially if on a domestic subject, such as "Bennet, the Butcher," "Davidge, the Dustman," "Harley, the Harper," "Vining, the Vintner." Why those very titles alone, by their tickling effect on the ear, would fill the pit and galleries of the Surrey, Victoria, or Adelphi theatres, for twelve consecutive months, if the pieces bearing those euphonious names were immediately produced.

Source: wiktionary