Hello,
The UAC and the Voice over USB does not work with my RAK2013 (EG95-E, EG95EFBR06A06M4G) HAT on my RPI4B 2GB plugged by USB and UART. I tried almost everything, but the created usb audio cards does not play any sounds and they also does not redirect any sound to the current call.
I followed every steps of Quectel Voice Over USB and UAC Application Note v1.0.
But nothing worked.
AT+QGPSCFG=“outport”,“none”
AT+QCFG=“usbcfg”,0x2C7C,0x0195,1,1,1,1,1,0,1
AT+QPCMV=1,2
Does create additional sound cards on my RPI, but
speaker-test -c1 -t sine -f 500 -r 8000 -D plughw:CARD=Android,DEV=0
Does not send any sound to the caller, and
AUDIODEV=plughw:CARD=Android,DEV=0 rec -c 2 -r 8000 -b 16 output.wav
Does not save any proper sound on the file.
Thanks for your work and help,
PS: Voice and audio does works if I use a headphone and mic with the built-in RAK2013 jack, but my goal is to stream audio in and out from software on my RPI4.
Best,