| 摘要 |
PROBLEM TO BE SOLVED: To provide a musical sound waveform forming method and a musical sound generating method and their device which can reproduce even a sound having fluctuations due to a frequency difference and an inharmonic sound at the time of additive synthesis. SOLUTION: A natural musical sound is inputted as a source waveform, a desired repetition degree (i) of analysis is inputted S1, and an analyzing means performs FFT for the input waveform to obtain frequency and amplitude information of respective harmonics S2. On the basis of the frequency and amplitude information, sin synthesis S3 is performed and synthesized waveform data are outputted to a storage means S4. Then the input waveform and the maximum harmonic of the synthesized waveform are made uniform in frequency and amplitude S5, the frequency and amplitude information is stored S6, and a difference waveform acquiring means subtracts the synthesized waveform after the process S5 from the input waveform to obtain a difference waveform S7. When the frequency of the said process does not reach the repetition degree (i) of analysis inputted at S1, a control means repeats the said process as many times as the degree (i) S8 to S10→S2 to S10 while regarding the difference waveform as an input waveform to obtain synthesized waveform data and the frequency and amplitude information of the waveform. Further, when the frequency of the process reaches the degree (i), the process is finished S11. |
