11. 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 from at least two of the respective audible signal data components, the one or more first directional indicator values are representative of a degree of similarity between the respective audible signal data components.
11. 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 from at least two of the respective audible signal data components, the one or more first directional indicator values are representative of a degree of similarity between the respective audible signal data components. 12. The method of claim 11 , wherein determining the one or more first directional indicator values includes: calculating, for each of the one or more first directional indicator values, a respective plurality of cross-correlation values between two of the respective audible signal data components for a corresponding plurality of time-lag values; and selecting, for each of the one or more first directional indicator values, the one of the plurality of time-lag values for which the corresponding one of the plurality of cross-correlation values more closely satisfies a criterion than the other cross-correlation values.