Tuner may refer to: someone or something which adjusts or configures something Antenna tuner, a device to adjust the resonance frequency of an antenna or transmission line Tuner (electronics) a module or device which converts low-amplitude radio-frequency signals into a form suitable for processing by further modules or equipment. Piano tuner, a professional who adjusts the pitch of pianos using a tuning fork or a frequency counter Electronic tuner, a device used by musicians to tune instr… (More on Tuner)