Motorola g20 - Audio

98-08901C68-O 157
AT Commands Reference
Example
at+mcwake=0
OK
at+mcwake?
+MCWAKE: 0
OK
at+mcwake=1
OK
at+mcwake=2
OK
at+mcwake=?
+MCWAKE: (0 - 2)
OK
4.8 AUDIO
The Audio feature in the g20 is made up of three main parts: Path, Gain and Algorithm. The Path features control the navigation
of the audio in the product. The Gain features control the volume of the different accessories, sounds and tones. The Algorithm
features control the audio quality, echo canceling and so on. All these features are accessible to the user via the Audio AT
commands described in the following sections.
• Path AT Commands:
The Audio may run in different paths that are related to the different Input or Output I/O accessories. The AT+MAPATH
command supports path changes, as described in “+MAPATH, Audio Path” on page 163.
• Gain AT Commands:
• Volume: The volume is set differently for each output path and audio feature (voice, keypad, and so on). For example,
one volume level for rings through the speaker and a different volume level for rings through the transducer. Therefore,
there will be 16 different volume levels, which is the product of the number of output accessories (speaker, headset
speaker, transducer and digital output) and the number of audio tones (voice, keypad, ring and alert).
• Input Accessories Mute: The user can mute any combination of the input accessories (mic, headset mic and digital input).
Gain related commands include:
• +MAVOL, Volume Setting, described on page 165.
• +MAMUT, Input Devices Mute, described on page 169.
• Algorithm AT Commands:
• Sidetone: Reduces the microphone audio input that is routed to the selected speaker so that the people speaking will hear
themselves talking. Use the AT+MAFEAT command, described on page 167. If g18 compatibility is required, refer to
“S94, Sidetone Effect” on page 160.
• Echo Cancel: Suppresses a large amount of the output sound picked up by the input device (cancels all echo). Use the
+MAFEAT command, described on page 167. If g18 compatibility is required, refer to “S96, Echo Canceling” on
page 161.
• Noise Suppression: Improves audio quality in all modes and suppresses environment noise from the input device.