EG915N UAC Mode : Audio quality issue

IoT Modules LTE Standard Module
1

Hello,

I am currently working on EG915N on Ubuntu 22.04.
I activated UAC using AT Command :

AT+QAUDCFG="uacmode",1
OK

After modem reboot, Ubuntu detect the modem as sound card (Android).
I set up this sound card as Output and Input Device.

I finally tried to use aplay and tinyplay to test as mentionned in “LTE Standard UAC Application Note” in a phone call :

ATDXXXX
OK
tinyplay music.wav -D 0 -d 0 -c 1 -r 8000

or

sox music.wav -t wav -b 16 -r 8000 -c 1 music_8000_16b_1c.wav
aplay music_8000_16b_1c.wav

I am able to hear the song but far way and very “chopped” and some noise, it’s difficult to understand something.

Is someone has experienced this issue before ? Or am i missing something ?

Thank you,

2

I don’ Know how to make VentaFax reproduce and enable the speaker and microphone…

3

Unfortunately me neither. I never used VentaFax

4

thank you anyway @AurelienB Merci! :slight_smile:

5

Hey!

I totally get your frustration with the audio quality on the EG915N. If the sound is coming through “far away” and “chopped,” it could be a mismatch in audio settings. Make sure the sample rate is songstraducoes.com consistently set to 8000 Hz for both input and output. Also, try switching USB ports or cables to see if that improves things. Let me know how it goes or if you have any other questions!

6

Thanks for the suggestion! I’ll check the sample rate and try a different USB port. Hopefully, that helps. I appreciate the help! Also, do you know if this issue affects Spotypre? I’ve been trying to get the best audio quality and want to make sure everything is set up right.