The present invention relates to a mute circuit and a mute control method for eliminating noise generated during a change period of an algorithm executed in a DSP (Digital Signal Process) And it is an object of the present invention to provide a mute circuit and a mute control method capable of removing a de-noise even if a mute function is performed only in a digital signal processing apparatus without having to provide a mute device.;In order to achieve the above-described object, the present invention receives the first data value transmitted from an internal bus and gently A data selector 12 for receiving the data transmitted from the internal bus in the normal state and for receiving the convergence data of the data convergence unit 11 at the time of mute, A first step (100,101,102,103,104) of detecting a damping direction and an initial data damping direction at the time of mute and setting a data change rate, a second step (105,106) of adding an initial data change amount to data of a mute start point, And a third step (105, 106) of adding a continuous change amount to the added value of the output signal. A fourth step (109,110,111,112) for limiting the absolute value of the data change amount to a certain range, and if the added value calculated in the third step reaches a predetermined limit value, And a fifth step 107,
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