[WP8548][mangOH] how to test audio system?

We try to mount our codec with IOT connector in mangOH kit.
Now we can control our codec by IIC and the sound card has brought up in kernel.
But we don’t know how to test the audio in application.
It will help us a lot if anyone can tell how to test audio system. Thanks in advance.

try https://forum.sierrawireless.com/viewtopic.php?f=181&t=9696

-Alex

Finally we test the audio by phone call. The following is the command for reference.
root@swi-mdm9x15:/mnt# microcom -E /dev/ttyAT
//Call out
atd0928XXXXXX;
OK

CONNECT

+CMTI: “SM”,5
ath
OK

//Call in
RING

+CLIP: “0928XXXXXX”,129,0
ata
OK

ctrl + x to leave