16. The method of claim 15 , wherein calculating the respective level difference values includes calculating the respective level difference values on a sub-band basis by utilizing corresponding sets of time-frequency units from each of at least one pair of the respective audible signal data components.
15. The method of claim 1 , wherein determining the one or more directional indicator values from the composite audible signal data includes determining one or more first directional indicator values, each of the one or more first directional indicator values is a function of a respective level difference value for each of at least one pair of the respective audible signal data components, each respective level difference value providing an indicator of relative signal powers characterizing the pair of the respective audible signal data components.