Disc reproducing apparatus and disc reproducing method

A disk playback device comprising:

• a playback means for playing back data on a disk;
• an audio output means for outputting audio data as an audio signal externally to the disk playback device when the audio data is played back by said playback means;
• an audio level manipulation means for manipulating an output level of the audio signal which is outputted by said audio output means;
• a detection means for detecting a set value of said audio level manipulation means;
• and
• a rotation speed control means for controlling a rotation speed of the disk which is played back by said playback means,
• wherein said rotation speed control means is operable to control the rotation speed of the disk on the basis of the set value detected by said detection means, and
• wherein said audio level manipulation means comprises a variable-resistance volume control operable to change the output level of the audio signal which is outputted from said audio output means.

A disk playback device comprising:

• a playback means for playing back data on a disk;
• an audio output means for outputting audio data as an audio signal externally to the disk playback device when the audio data is played back by said playback means;
• an audio level manipulation means for manipulating an output level of the audio signal which is outputted by said audio output means;
• a detection means for detecting a set value of said audio level manipulation means;
• and
• a rotation speed control means for controlling a rotation speed of the disk which is played back by said playback means,
• wherein said rotation speed control means is operable to control the rotation speed of the disk on the basis of the set value detected by said detection means, and
• wherein said audio level manipulation means comprises an electric volume control comprising a switch means and an audio level set value storage means which can vary a set value by an operation of said switch means, and is operable to change the output level of the audio signal outputted from said audio output means on the basis of the set value in said audio level set value storage means.

A disk playback device comprising:

• a playback means for playing back data on a disk;
• an audio output means for outputting audio data as an audio signal externally to the disk playback device when the audio data is played back by said playback means;
• an audio level manipulation means for manipulating an output level of the audio signal which is outputted by said audio output means;
• a disk moving means for placing a disk in a playable state;
• a detection means for detecting a set value of said audio level manipulation means;
• and
• a rotation speed control means for controlling a rotation speed of the disk which is played back by said playback means,
• wherein said rotation speed control means is operable to control the rotation speed of the disk on the basis of the set value detected by said detection means, and
• wherein said rotation speed control means is operable to perform control for playing back data on the disk at a preset rotation speed of the disk immediately after the power is turned on or immediately after the disk is placed in a playable state by said disk moving means.

A disk playback device comprising:

• a playback means for playing back data on a disk;
• an audio output means for outputting audio data as an audio signal externally to the disk playback device when the audio data is played back by said playback means;
• an audio level manipulation means for manipulating an output level of the audio signal which is outputted by said audio output means;
• a detection means for detecting a set value of said audio level manipulation means;
• and
• a rotation speed control means for controlling a rotation speed of the disk which is played back by said playback means,
• wherein said rotation speed control means is operable to control the rotation speed of the disk on the basis of the set value detected by said detection means, and
• wherein when the disk rotation speed with respect to the set value detected by said detection means is over the maximum rotation speed of the disk playback device, said rotation speed control means makes the set value the maximum rotation speed of the disk playback device.