Aspects of the present disclosure relate to a method and system for processing an audio signal to optimize the localization of sound in a sound system using a head related transfer function HRTF). A location of a user is determined and a speaker is driven with a waveform representing a location specific cue having a desired user response. The location specific cue is associated with a defined HRTF for the determined location of the user. A user response to location specific cue is detected and compared to the location specific cue. The defined HRTF is then updated with information from the comparison of the user response to the location specific cue.