SYSTEM, AUDIO GUIDANCE OUTPUT CONTROL METHOD, TRANSMISSION DEVICE, AND RECEPTION DEVICE

In a system in which a transmission device and reception device communicate with each other, the transmission device has a first output unit which outputs a first audio guidance, and a transmission unit which transmits, to the reception device, an output instruction that instructs the reception device to output a second audio guidance related to the first audio guidance at a timing corresponding to an output timing of the first guidance, and the reception device has a reception unit which receives the output instruction transmitted by the transmission unit, and an output unit which outputs the second audio guidance at a timing according to the output instruction received by the reception unit.