| 摘要 |
PURPOSE: To eliminate a click noise by setting waveform composition sections on both sides of plural loop points selected out of waveforms in plural cycles and putting 1st and end corresponding envelope-given waveforms in at least one waveform composition section. CONSTITUTION: The loop points A-D are selected out of the waveforms in plural cycles and the waveform composition sections are set on both the sides of those loops points A-D; and the 1st envelope is given to the waveforms in those waveform position sections to obtain the 1st envelope-given waveform which has its original amplitude at the start and end points of each waveform composition section, gradually decreases from the start point to the loop points A-D, and gradually increase up to the end point. Waveforms in respective waveform composition sections are rearranged reversely with time, and an end envelope is given to the reversely rearranged waveforms to obtain the 2nd envelope-given waveform which has no amplitude at the start and end points of the rearranged waveforms, gradually increases from the start point to the loop points A-D, and gradually decrease up to the end point. Than the 1st and 2nd corresponding envelope-given waveforms are put together in at least one waveform composition period. |
