Abstract: An information processing apparatus is connected to a sound output device for outputting sound based on digital audio data. The information processing apparatus includes the following elements. A first receiver receives setting data for setting a volume of sound output from the sound output device, the volume being set by a function implemented by a first computer executing a first program. A second receiver receives a setting signal for setting a volume of sound output from the sound output device, the volume being supplied from a setting unit provided for the sound output device. A calculator calculates first volume control data that controls the volume of sound output from the sound output device based on the setting data and the setting signal, the volume being controlled by a second computer executing a second program. A first output unit outputs the first volume control data to the sound output device.

Abstract: An authentication device and an authentication method, a program storage medium and an information processing device improve the operability in the user authentication. By comparing the dial password entered by the rotation operation of the jog dial and the dial password registered in advance and conducting the user authentication, the user can enter the dial password intuitively and easily just by operating the jog dial and can make the user authentication be executed.