调音员

例句：

1. 1. The radio engineer was responsible for tuning the station's frequency.
   无线电工程师负责调整电台的频率。
2. 2. The piano player needed to tune his instrument before playing.
   钢琴家在演奏前需要调音他的乐器。
3. 3. The sound engineer is in charge of ensuring that all equipment is tuned correctly.
   声学工程师负责确保所有设备都调校正确。