| 摘要 |
Phase setting section (34) sets virtual phases in a frequency series of an audio signal (XA). Unit wave extraction (36) section extracts, from the frequency series, a unit wave of one cyclic period defined by the set virtual phases, for each of a plurality of time points. First generation section (561) generates velocity information corresponding to a degree of compression/expansion, to a predetermined length, of the unit wave. Second generation section (562) generates shape information indicative of a shape of a frequency spectrum of the unit wave having been adjusted. Variation component impartment section (40) generates a variation component by use of the velocity information and shape information generated for the individual time points. |
