tone of voice; timbre
Refers to the quality or character of a voice, often implying a particular emotional coloring or manner of speaking. Common in literary or descriptive contexts.
Her tone of voice was filled with kindness.
I could tell from his tone of voice over the phone that he was angry.
Compound of 声 (こえ, voice) and 音 (ね, sound). The reading こわね is a euphonically contracted form of こえね.