Patent ID: 8457969

Claim:
An effect device comprising: an input means for inputting an audio signal; an effect providing means for acquiring the audio signal at a plurality of times, the effect providing means for providing an effect to the acquired audio signal to produce an audio effect signal; and an output means for outputting the audio effect signal; the effect providing means comprising: a determination means for determining whether the acquired audio signal is a vowel or a consonant; a detection means for detecting whether the acquired audio signal was switched from a consonant to a vowel; a first change means for changing a pitch of the acquired audio signal by an amount when the detection means detects that the acquired audio signal was switched from a consonant to a vowel; a first convergence means for converging the amount the pitch is changed by the first change means to a value based on a prescribed function; and a first output means for outputting the converged audio signal as the audio effect signal to the output means.