Patent ID: 8244111

Claim:
An optical disk device, comprising: a reproduction component configured to direct a laser beam at an optical disk that is loaded in the optical disk device with the optical disk storing a plurality of audio data streams in a plurality of different acoustic qualities, the reproduction component being further configured to reproduce one of the audio data streams; an output component configured to output the one of the audio data streams reproduced by the reproduction component to an amplifier that is configured to be electrically connected to the optical disk device, the amplifier being further configured to output audio signal to a speaker based on the one of the audio data streams; and a control component configured to acquire from the amplifier first audio format information indicating audio formats to which the amplifier corresponds, and configured to acquire from the reproduction component second audio format information indicating audio formats of the audio data streams stored in the optical disk, the control component being further configured to determine whether or not a default acoustic quality determined by a predetermined default setting of a control program recorded to the optical disk matches a predetermined high acoustic quality, the control component being further configured to determine out of the audio data streams stored in the optical disk the one of the audio data streams with an audio format that belongs to both the first audio format information and the second audio format information only when the control component determines that the default acoustic quality does not match the predetermined high acoustic quality, the control component being further configured to issue a command to the reproduction component to reproduce the one of the audio data streams.