DEVICE FOR FORMING DIGITAL ACOUSTIC WAVEFORM, FORMATION OF DIGITAL ACOUSTIC WAVEFORM, METHOD FOR UNIFORMALIZING DIGITAL ACOUSTIC WAVEFORM, OF MUSICAL SOUND WAVEFORM FORMING DEVICE AND MUSICAL SOUND WAVEFORM FORMING DEVICE

摘要

PURPOSE: To form digital acoustic waveforms uniformalized in the variations in intensity and timbre between compasses and to form the digital acoustic waveforms having the timbres corresponding to the sounds of natural musical instruments in arbitrary performance intensity. ;CONSTITUTION: The digital acoustic waveforms of a prescribed length segmented in a data length adjusting section 201 is subjected to FFT computation in an FFT section 202 and plural kinds of amplitude spectra are calculated in an amplitude spectrum calculating section 203 and one kind of phase spectra are calculated in a phase spectrum calculating section 204. An amplitude spectrum interpolation section 205 calculates the amplitude spectrum interpolated from plural kinds of the amplitude spectra. A complex spectrum synthesizing section 206 synthesizes the complex spectra having the interpolated amplitude spectra and having one kind of the phase spectra. A reverse FFT section 2907 subjects the complex spectra to reverse FFT computation and forms the digital acoustic waveforms unified in the spectra.;COPYRIGHT: (C)1994,JPO