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Hannah had a melodious voice that made everyone fall in love with her.
One of the effective ways to use melodious in a sentence is by using it in a simile.
Ex.
Her voice was as melodious as the song of the nightingale.
The melodious symphony hushed like the sound of the wind rustling dried leaves.
The piano player played a melodious piece by Mozart.
Dulcet means soft, soothing, melodious
I think you mean melodious. Melodious means tuneful of agreeable to hear