Motorola Mobility LLC T56KT1 User Manual

Advanced audio mode utilizes G30's unique set of AT commands for advanced audio 
programming. The expanded AT command set enables to define a specific audio path and setting, 
which are not part of the default configuration, for each type of audio sound (speech, DTMF 
tones, rings and alerts).

Unlike basic audio mode, which provides predefined audio paths, the advanced audio mode 
provides full control over the G30 audio interface and its parameters, and differentiates between 
each type of audio sound.

 describes the advanced mode audio programming features. These features are only a 

part of the complete advanced audio AT command set.

The G30 incorporates a unique audio programming interface, through AT commands, which 
controls the following audio features:

Audio Path - Defines the input and output devices for speech, DTMF tones, rings and alerts.

Audio Gain - Defines the amplification (gain) level for input and output audio devices.

Audio Algorithm - Defines the speech processing features for voice calls.

AT+MAPATH

Sets the input device for voice, and the output 
devices for voice, DTMF tones, rings and 
alerts.

AT+MAFEAT

Enables and disables the speech processing 
algorithms - Echo suppression, noise sup-
pression and sidetone.

AT+MAVOL

Sets the gain (amplification) level of the 
selected analog output device.

AT+MMICG

Sets the gain (amplification) level of the 
selected analog input device.

AT+MMICV

 Sets the MIC bias voltage.

AT+MADIGITAL

Switches between analog and digital audio 
paths.