Gain Control - Motorola G24 Developer's Manual

Table 2-13
Feature
Echo Suppression
Noise Suppression
Sidetone

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 2-14
Device
Microphone
Headset Micro-
phone
Speaker
Alert Speaker
Gain levels for the input and output devices, which correspond to the values set by the AT
commands, are described in
January 1, 2006
gives the speech processing features.
Table 2-13: Speech Processing Features
AT Command
Basic Advanced
ATS96 AT+MAFEAT
ATS94 AT+MAFEAT
gives the gain control features.
Table 2-14: Gain Control Features
Gain Command
Basic Advanced
AT+MMICG AT+MMICG
AT+CLVL
AT+MAVOL
AT+CRSL
Table 2-15
Table 2-15: Speaker Port Gains for Speech
AT Command
Value
0
1
2
3
Module Hardware Description
Chapter 2: Hardware Interface Description
Default
Setting
Controls the echo and noise suppres-
Disabled sion.
Enabled Controls the sidetone.
Default
Gain Description
3 Sets input speech gain level.
3 Sets input speech gain level.
4 Sets voice and DTMF gain.
4 Sets rings and alerts gain.
and Table 2-16.
0dBm0 Output
0dBm0 Gain
Level (mV
Level (dB)
-36
-33
-30
-27
Description
)
RMS
12
17.5
25
34.5
39