AUDIO PROCESSING APPARATUS, AND AUDIO PROCESSING METHOD

The invention provides an audio processing apparatus and an audio processing method, which can obtain the orientation of the head of a listener with high precision even if drifting occurs. The audio processing apparatus includes a sensor configured to output a detection signal in accordance with an orientation of the sensor; a memory storing instructions; and at least one processor that implementsthe instructions to: sequentially generate, based on the detection signal, orientation information pieces each indicative of the orientation of the sensor; correct a current orientation information piece based on an average of a first plurality of orientation information pieces, among the sequentially generated orientation information pieces, and generate a corrected current orientation information piece; determine a head-related-transfer function in accordance with the corrected current orientation information piece; and apply a sound-image-localization processing to an audio signal based onthe determined head-relat