10. The apparatus according to claim 8 , wherein the computer is further programmed to reconstruct, by a phase reconstructor, a phase spectrum by linearly combining the feature amounts indicating the phase characteristics and the plurality of basis vectors included in the basis model stored in the basis model storage.
10. The apparatus according to claim 8 , wherein the computer is further programmed to reconstruct, by a phase reconstructor, a phase spectrum by linearly combining the feature amounts indicating the phase characteristics and the plurality of basis vectors included in the basis model stored in the basis model storage. 11. The apparatus according to claim 10 , wherein the computer is further programmed to generate, by a generator, a multi-pulse sound source signal from the phase spectrum.