| 摘要 |
<p>An optical disc has a recording structure consisting of an ROM section and an RAM section which are preferable for multiplexing recording/reproduction of music information and the like On the optical disc, the ROM section where information has been recorded by a phase pit using the light reflectance and the RAM section on/from which recording and reproduction can be preformed are arranged in layers and information recorded in the ROM section and the information recorded in the RAM section are synchronously reproduced. The RAM section is divided into a plurality of information recording areas from which information can be reproduced synchronously with the ROM section. While reproducing music information from the ROM section, music information such as music by separate musical instruments is multiplexedly recorded on the RAM section and multiplexedly reproduced when necessary.</p> |
