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Accessing External Microphone in Android App

Does anyone know how to access the external mic (if one is plugged into the 3.5mm jack) in an Android app?


Most camera apps on the market use the built-in mic, even if an external one (like the one that comes with the headset) is plugged in. I found one app, LG Camera, that actually uses the external mic.


I'm digging through the SDK, but can't seem to figure out how to tell my app to also use the external mic...


Any clues?
 
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