MTK Android Driver ：audio para
http://blog.csdn.net/cbk861110/article/details/1743945331.音频参数集成（具体参数由硬件提供）30.1 ring/key/mic/fmr/speech/sidetone/media/matv增益：\mediatek\custom\k9\cgen\inc\audio_volume_custom_default.h
