a disc storage section 109 the disc storage section 109 stores a mixture of discs suitable for continuous playback such as cds and discs unsuitable for continuous playback such as vcds and dvds a program is stored in the memory section 102 the memory section 102 is used as a work area which is used when the program is executed and where for example a custom file to be discussed later is registered or various disc information including a management table to be discussed later is set and stored the control section 101 controls the individual functional blocks 103 104 105 and 106 in accordance with the program stored in the memory section 102 specifically the control section 101 detects inputs made through the keyboard 3 remote controller 4 mouse 5 or the like and fetches information that is acquired through the disc in out detecting section 103 which is comprised of a sensor the control section 101 performs optimal control of the servo section 104 to drive the spindle motor 107 and pickup 108 the control section 101 also controls the disc feeding section 105 to load a disc into the disc storage section 109 or unload a disc therefrom the playback section 106 demodulates a recorded signal which is read by the pickup 108 performs d a conversion of the recorded signal and sends the resultant digital signal to the image and voice monitor 2 not shown in fig1 with the above described structure when a user depresses an auto update key not shown located on the front panel of the disc changer 1 an auto update operation is carried out to read information of discs stored in the disc changer 1 and register the disc information in the memory section 102.