Echo Algorithm - Quectel GSM Series Audio Design Manual

3.1.3. Echo Algorithm

AT+QAPS is used to modify echo algorithm parameters of all three software audio channels.
AT+QAPS
Set Command
AT+QAPS=<mode>,<type>,<channel>
,<setting>
Set Command
AT+QAPS=<op>,<para1>[,<para2>[,<
para3>]][,<setting>]
Parameters：
<op> Operation
0 Get old value
1 Set new value
<para1> Type of parameters
0 Input FIR Coeffs
1 Output FIR Coeffs
2 FIR output Index
3 Speech Common Para
4 Speech Mode Para
<para2> Group/mode of parameters
When para1=0/1/4, para2 is a must.
Ranges from 0~2, corresponding to the audio mode.
0 Normal mode
1 Headset mode
2 Loudspeaker mode
See detailed information in notes below.
<para3> Batch number of parameters.
GSM Module Audo Design Guide
Response
+QAPS: <op>,<para1>[,<para2>[,<para3>]][,<setting>]
OK
Response
If <op> is read,
+QAPS:<result list>
OK
If <op> is write,
OK
If format is error, response
+CME ERROR: <err>
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