| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sounding audio source system that corresponds to multi-polyphony without using a high performance processor. <P>SOLUTION: Music data are read by the message group with a music data reading part 15 after being stored in a music data storage part 14, and an arithmetic processing time of the processor required for the processing is calculated in a processing time determining part 16. When the arithmetic processing time is longer than a prescribed time, it is determined that a front-loaded processing is necessary, and the message group unit of the music data are converted into messages of preparation phase and execution phase in a music data conversion part 17. The music data determined that the front-loaded processing is unnecessary and the music data converted in the music data conversion part 17 are temporarily stored by the message group in a data buffer 18, are read by a data output control part 20 according to a timing signal from a timer 19 so as to generate control data for driving audio source, and are output to an audio source accelerator 21 for executing an audio synthesis processing. <P>COPYRIGHT: (C)2008,JPO&INPIT |
