A control unit to set a priority level to operate the audio replay function so that the priority level is higher in an abnormal operation of the apparatus than in a normal operation of the apparatus is provided in the image forming apparatus 10 which comprises a plurality of functions including an image forming function and an audio replay function. For example, the priority level of the audio replay function to a lowest level in the normal operation, and sets to a highest level next to a priority level of the image forming function in the abnormal operation.