tuner
/ˈtjuːnə(r)/noun
1- a person who tunes musical instruments, especially pianos（尤指钢琴）调音师。
1.1
- an electronic device for tuning a guitar or other instrument（吉他等的）电子调节器。
1.2
- an electronic device for varying the frequency to which a radio or television is tuned（收音机、电视的）调谐器。
1.3
- a separate unit for detecting and preamplifying a programme signal and supplying it to an audio amplifier（扩音器的）调谐部件。
1.4
- a person who tunes car engines or other machines（汽车引擎或其他机器的）调试者。