C24 Hardware Interface Manual
Version 0.3
TABLE 15 – Speech processing features
AT command
Default
Feature Description
Setting
Basic Advancd
Echo
Suppression
Controls the echo and
ATS96 AT+MAFEAT Disabled
noise suppression.
Noise
Suppression
Sidetone ATS94 AT+MAFEAT Enabled Controls the sidetone.
2.8.8.2 Gain Control
The amplification (gain) level for each input and output device can be configured through AT commands.
Both basic and advanced audio modes provide AT commands to set the desired gain levels for each
audio path and audio sound type.
TABLE 16 – Gain Control Features
Gain Command
Default
Device Description
Gain
Basic Advanced
Microphone 3
Sets input speech gain
level.
AT+MMICG AT+MMICG
Headset Sets input speech gain
3
Microphone level.
Speaker AT+CLVL 4
Sets voice and DTMF
gain.
AT+MAVOL
Sets rings and alerts
Alert Speaker AT+CRSL 4
gain.
The gain levels for the input and output devices, which correspond to the values set by the AT
commands, are described in the following tables.
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