Provided is a control program of an audio device which performs automatic control on the audio device so as not to interfere with a telephone call. A control unit of a mobile telephone equipped with a telephone communication unit is caused to function as an operation detector that detects a user operation, an incoming call detector that detects an incoming telephone call to the telephone communication unit, and a command transmitter that communicates with an audio device that outputs a reproduced sound, and the command transmitter transmits a command message containing control contents corresponding to the user operation to the audio device when the operation detector detects the user operation, and transmits a command message for controlling the reproduced sound to the audio device when the incoming call detector detects the incoming telephone call.