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sound; noise
(musical) note
fame
「音」 has other readings with different meanings.
隣の部屋から変な音が聞こえます。
I can hear a strange sound from the next room.
楽譜の最初の音は少し低めに弾く。
Play the first note of the score slightly low.
音を小さくしてください。
Please turn down the sound.