Gain Control; Gain Control Features; Speaker Port Gains For Speech - Motorola 8900 - Blackberry Curve Cell Phone OEM Car Charger Developer's Manual

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 2-13
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
December 15, 2008
gives the gain control features.
Table 2-13: Gain Control Features
Gain Command
Basic Advanced
AT+MMICG AT+MMICG
AT+CLVL
AT+MAVOL
AT+CRSL
Table 2-14
Table 2-14: Speaker Port Gains for Speech
AT Command
Value
0
1
2
3
4
5
6
7
C24 Module Hardware Description
Chapter 2: Hardware Interface Description
Default
Gain
16 Sets input speech gain level.
16 Sets input speech gain level.
4 Sets voice and DTMF gain.
4 Sets rings and alerts gain.
and Table 2-15.
0dBm0 Output
Gain Level
Level (mV
(dB)
-9
-6
-3 26.5
0 37.5
3
6
9
12
Description
)
RMS
13
19
53
75
120
168
35