名词
中文翻译：调音器
同义词：
['tuner', 'tune-key', 'tuning device']
例句：
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1. The tone keyer is used to adjust the volume of a recording.
调音器用于调整录音的音量。
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2. The tone keyer was used to fine-tune the sound quality of the music.
调音器被用来精细调整音乐的声音质量。
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3. The engineer used the tone keyer to match the pitch of the instruments with the song.
工程师使用调音器来匹配乐器与歌曲的音高。