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O.R.T.F.

This technique was adopted by French Radio and uses two cardioid microphones spaced by 17cm (roughly the same as ear spacing) and angled outwards at 110 degrees.  This fine technique often gives a greater sense of space than coincident techniques due to the microphones being ear spaced and thus capturing phase information as well as intensity information. 

Its main advantage is that because it uses cardioids, the microphones can be placed further back from the source without capturing too much of the reverberation than most other techniques. This often makes for a better blended balance than techniques that mean putting the microphones a little closer. Also, the use of cardioids enables you to use it in over reverberant acoustics where other techniques would capture too much of the acoustic.

   
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