Dulcet(adjective)
Sweet and soothing, often referring to sound; pleasant to hear. (????, ??????)
Synonyms: Melodious, Harmonious, Soothing, Mellow
Antonyms: Harsh, Discordant, Grating, Unpleasant
Example: The dulcet tones of her voice calmed everyone in the room.
Trick to remember: Dulcet sound sunte hi dil set ho jaata hai. 
