according to the invention is a person to sing the chorus. a lot of people like to hear the case that allows a function to take on the sound, in the past, the noise of the specific frequency or the like in order to highlight the regicide. the range of the frequency change the value of the chorus effect, but the mechanism has not been developed.;the design of the microphone (1) through an input voice signal is used to (4) according to the operation of a different frequency in the frequency modulation function to take revenge of the frequency modulation (MF1 or MFn) is caused by the change of the modulation signal for the same speakers (3) by the way calendar, with the chorus effect, and can feel it.
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