| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to reproduce plural main information at the same time without using plural reproducing devices. SOLUTION: A CPU 14 reads audio data of two pieces of music from a storage device 1 at the same time, respectively, and also, when one or both of the audio data of the two read melodies are stereo data, the stereo data are converted into monaural data by one or both of mixing parts 2, 3. The converted monaural data are supplied to expansion parts 4, 5 for R and Lch, respectively, and operated with expansion processing to obtain an original PCM data, and then, the PCM data are supplied to D-A converters 6, 9 for R and Lch to convert the data into along data here. Further, the data are amplified to the data at a desired sound pressure level by amplifiers 7, 10 for R and Lch, and externally emitted as sound by the loudspeakers 8, 11 for R, Lch.
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