Patent ID: 7933768

Claim:
A vocoder system comprising: formant detection means for analyzing a first musical tone signal to detect formant characteristics of the first musical tone signal; musical tone signal input means for inputting a second musical tone signal that corresponds to specified pitch information; formant generation means for generating new formant characteristics of the first musical tone signal based on the formant characteristics of the first musical tone signal, formant control information for generating the new formant characteristics from the formant characteristics, and the specified pitch information corresponding to the second musical tone signal; division means for dividing the second musical tone signal into a plurality of frequency bands, the respective center frequencies of which have been fixed; setting means for setting modulation levels, based on the new formant characteristics of the first musical tone signal, only at the fixed center frequency of each of the frequency bands of the second musical tone signal; and modulation means for modulating a level of a signal of each of the frequency bands of the second musical tone signal based on the respective modulation level set in the setting means.