How to use gsm EG91 modem analog output for mic and speaker without external codec

IoT Modules LTE Standard Module
1

Hi
I am trying to use analog output for mic and speaker for EG91 modem.
I execute below command for analog output:
AT+QDAI=1
AT+QSIDET=5
AT+QAUDLOOP=1 (got error)
But still not able to hear anything. By using external coded everything is working fine.

Hope you can help on this.

Regards,
Rahul

2

But I don’t see that EG91 supports analog audio output…

3

I am using the module EG915NEUAGR03A09M16. Upon reviewing the audio AT command manual, I noticed that it mentions the use of a built-in codec.
Could you please clarify what is meant by this?

doc ref: Quectel_EC200x&EG912Y&EG915N_Series_Audio_Application_Note_V1.1.pdf

4

EG91 is not the same with EG915N.
Please check
AT+QAUDSW?
i am not sure whether it support internal CodeC?
Have you swith it to internel codec?
And the hardware disign for internel CodeC and external CodeC is not the same.

5

Yes, it has, and I already set to 1
AT+QAUDSW=1 for in built codec