I can hear the wave file and record a wave file in mangoh green board:
root@swi-mdm9x28-wp:~# microcom /dev/ttyAT
at!avcfg=5,1,2
OK
AT!AVSETPROFILE=5
OK
AT!AVAUDIO=1,1,/home/root/0-to-9_8k.wav
OK
AT!AVAUDIO=1,0
OK
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7608
Revision: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
IMEI: 352913090512345
IMEI SV: 14
FSN: XG207430712345
+GCAP: +CGSM
OK
AT!AVAUDIO=2,1,/tmp/record.wav
OK
AT!AVAUDIO=2,0
OK
AT!AVAUDIO=1,1,/tmp/record.wav
OK
AT!AVAUDIO=1,0
OK