39. A directional filter comprising: a directional indicator value calculator configured to determine one or more directional indicator values from composite audible signal data, the composite audible signal data including a respective audible signal data component from each of a plurality of audio sensors; a gain function calculator configured to determine a gain function from the one or more directional indicator values, the gain function targeting one or more portions of the composite audible signal data, wherein generating the gain function from the one or more directional indicator values includes determining, for each directional indicator value, a respective component-gain function based on the directional indicator value and a corresponding target value associated with the directional indicator value, and the respective component-gain function includes a distance function of the directional indicator value and the corresponding target value; and a filter module configured to apply the gain function to the composite audible signal data in order to produce directionally filtered audible signal data.
40. The directional filter of claim 39 , further comprising a windowing module configured to generate a plurality of temporal frames of the composite audible signal data, the composite audible signal data including a respective audible signal data component from each of a plurality of audio sensors.