| 摘要 |
PURPOSE:To decrease the capacity of the whole memory by composing waveform data of fundamental waveform data in a fundamental waveform memory and difference waveform data in a difference waveform memory. CONSTITUTION:The waveform data composed of the fundamental waveform data stored in the fundamental waveform memory 20 and the difference waveform data stored in the difference waveform memory 22 is outputted. The difference waveform data corresponds to the difference between the fundamental waveform data and other fundamental waveform data different from the fundamental waveform data, so even when those fundamental waveform data becomes slightly different from those fundamental waveform data. Namely, the waveform data which varies delicately about the fundamental waveform data can be obtained. Further, the difference waveform data corresponds to the difference between the fundamental waveform data and other fundamental waveform data, so the number of data bits may be small. Consequently, the memory capacity can be decreased. |
