Audio Programming Interface; Audio Algorithms - Motorola G24 Developer's Manual

Audio Interface

Audio Programming Interface

The G24 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.
Figure 2-25
commands.
Figure 2-25: Audio Programming Interface

Audio Algorithms

The G24 audio interface features advanced speech processing algorithms for echo suppression,
noise suppression and side-tone feedback
Enabling or disabling the algorithms can be configured separately for each audio path and
operating mode through the AT command interface.
The G24 also supports full rate (FR), half rate (HR), enhanced full rate (EFR) and adaptive
multi-rate (AMR) speech coding algorithms, which are used by the GSM network. These
algorithms are configured and operated by the GSM network provider.
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describes the audio programming interface options, which are defined by AT
Module Hardware Description January 1, 2006