High audibility output is realized when audio output is provided in
special playback. In special playback with audio output, skip/repeat
control is done so that decoding and outputting of the audio data is
periodically repeated/skipped during part of one frame. The output level
may be corrected so as to emphasize appropriate frequency components.
This realizes good audio output. In addition, the skip/repeat control and
output level correcting methods are changed according to characteristics
of the audio data to be reproduced. Also, this realizes good audio
output.