muted

Muffled; indistinct.

Mute or subdued; softened.

Produced by or provided with a mute.

Of musical instruments, played with a mute: as, muted strings or muted horns. Also applied to the tones thus produced.

same as quiet. Opposite of noisy.

softened; rendered less loud or harsh; — of sounds and instruments which produce sounds.

Simple past tense and past participle of mute.

in a softened tone

being or made softer or less loud or clear