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Using the microphone array to detect the direction of sound?

edited January 28 in Questions And Answers

according to Joe Kelly in his talk
he mentions around 0.46.00 that the HoloLens device has an in-build array of 4 microphones, 2 near the front that are meant for voice-capture and 2 on the outer side that can be used for room-capture; and also these should be accessible for developers through the HoloToolKit.
How does one access the microphones for room-capture and is it possible to use them to detect (at least rough) direction of outside sounds? Kind of like this but only using the HoloLens in-build microphone array?

Also, is it something that could be done in the Emulator as well?


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