| 摘要 |
PURPOSE:To generate a loop Waveform whose loop start point and end point meet zero-cross positions of a waveform from digital waveform data according to simple specification. CONSTITUTION:The number M of sampling points in each basic cycle of a waveform having a reference pitch is calculated when the waveform signal is sampled in sampling cycles T. Then when the waveform section of one basic cycle for loop regeneration is specified, the loop section from the start zero-cross position LST of the waveform section to the end zero-cross position LET of the loop section is extracted to calculate the loop section length (LET-LST). This loop section length is divided by M to calculate a sampling cycle T'. Then the signal is resampled in sampling cycles T' so that the LST and LET are included as sampling points LSP and LEP, thereby generating loop waveform data. |
