Microphone Gain

The microphone gain is not manageable by the user, only by the admin. If the default behavior (close talker) does not give satisfaction, these settings can be used to change the microphone gain (user settings or boot settings):

application.xma.codec.0.register.26

application.xma.codec.0.register.15

Use

application.xma.codec.0.register.26 = 0

To disable the codec Automatic gain control and manualy set the gain using this setting:

application.xma.codec.0.register.15

This setting is in 1/2dB.

See also the section about Audio Profile