How to control MIC Input Gain (TC55/Android)



We are evaluating TC55(Android 4.1) with voice recognition
engine. Also we learned that MIC input gain was too high to utilize this engine.

If we can reduce the gain, this should work fine.

In fact, we confirmed that this worked fine with using the adapter which reduces the gain.


Do we have the way to control MIC input gain?

Or please let me know how to control the gain for this purpose.


Your side input would be greatly appreciated.

Robert Galvin
Are you trying to do this

Are you trying to do this progromatically or through some configuration file?

Progromatically, I would check Like:

AutomaticGainControl | Android Developers

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