| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital signal processor which can access a DRAM for sound waveform data delay fast and efficiently and easily process a waveform signal. SOLUTION: The digital signal processor 21 for sound waveform data which gives effects to music sound waveform data has a waveform signal processing part 22 and a memory access part which is conceptually shown by switches 23a and 23b. The waveform signal processing part 22 has equivalently two time-division waveform signal processing parts 22a and 22b through time-division processing. The switches 23a and 23b enable the start of access to DRAM's 24a and 24b provided externally corresponding to the time-division waveform signal processing parts 22a and 22b in timing with a mutual delay of a specific time and also enable the sound waveform data to be written to or read out of the corresponding DRAM 24a or 24b at a write or read request. |
