modulate
verb [ T ] uk/ˈmɒdʒ.ə.leɪt/ us/ˈmɑː.dʒə.leɪt/
(SOUND)
[ I or T ]改变（嗓音）的音量（或音质等），调节（声音）
to change the style, loudness, etc. of something such as your voice in order to achieve an effect or express an emotion
His gentle introductory tone modulates into a coach's pre-game pep talk. 他语气温和的开场白变成了足球教练赛前鼓舞士气的慷慨陈词。
[ I ] specialized（音乐）变调
to change from one musical key to another
Here we modulate from G major to A minor. 这儿我们从G大调变成A小调。
(PLAN/PROCESS)
[ T ] formal调节，调整
to change something, such as an action or a process, to make it more suitable for its situation
An elected committee will meet monthly to modulate the council's energy policy. 一个选举产生的委员会将每月碰面以调整市政会的能源政策。
(BROADCASTING)
[ T ] media specialized调制（无线电波）;调谐
to mix an electrical signal that represents sounds or pictures with a radio signal so that it can be broadcast