Effect administering equipment for controlling two-dimension voice image positioning

The present invention provides an effect imparting device which inputs configured to obtain the original multichannel audio signal is a two-dimensional sound image localization, the audio signal including the assignment of each channel of the multichannel audio signal inputted to each output channel. Each signal is assigned according to a deviation from the initial two-dimensional sound image localization coefficient is multiplied by a corresponding separately determined for each output channel. Then, allocated to the respective channels and outputs the audio signal multiplied by the corresponding coefficients are added, one for each output channel. Thus, the output of each output channel audio signal have added as a multi-channel audio signal, the multi-channel audio signals in accordance with a sound image localization variation has changed. If the change from the original two-dimensional sound image localization variation over time can be obtained so that the effect of panning the initial moving sound image localization. Rotation can be easily performed in the sound image localization panning control.