In this paper, we propose a new interactive controller for audio object localization based on spatially representative vector operations on a stereo mixed source.

First, we developed the interactive controller, which is equipped with a capacitive touchscreen panel so that the  listener can intuitively operate audio objects displayed on the touchscreen panel with a touch pen.

Next, we assessed the perceptual effects of localization and the sound quality of an audio object after performing individual operations to verify the operation of the interactive controller via a subjective evaluation.

The results of the experiments clarify that the interactive controller  enables the listener to change the gain and the localization of audio objects without sound degradation if the gain operation is not extreme.