tuner
n.n. a person who adjusts the radio or television to get the best signal. It can also mean a tool used to change the pitch of a musical instrument.
n. a person who adjusts the frequency of a radio or television receiver to receive a specific signal. In a musical context, refers to a device or person that adjusts the pitch of an instrument to ensure it is in tune.
The radio tuner is broken, so I cannot find the station.
The technician used a digital tuner to ensure the satellite signal was strong enough for the entire building.
While the lead guitarist relied on a high-precision electronic tuner, the drummer used a traditional tuning fork to maintain the acoustic integrity of the performance.
From tune (verb) + -er.
From tune (noun) + -er (“Variety -er”).