When a point on a tablet is designated by a marker, a recording indication signal is on, and recording of sound data is started. When the marker is released from the tablet, the recording indication signal is off, the recording of the sound data is finished, and coordinate data of the point and the sound data are linked. When information, such as characters, is inputted on the tablet using the marker, coordinate data based on the input and the sound data are linked through the coordinate data of the point. When the information such as characters is designated using a marker for playback, the sound data is played back.