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OPI Zero 3 can't manage USB Audio Device in Debian 12

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Published in 2023-11-3 17:39:20 | Show all floors |Read mode
I recently purchased a OPi Zero 3 4Gb with expansion board to connect to my Xiegu X6100 ricetrans to run FT8 connections via wsjtx application. Unfortunately the connection Opi Zero 3 with X6100 via USB could'nt work since the OPi Zero 3 recognized the  USB Audio Device C-Media Electronics Inc. but the pulseaudio does not since pavucontrol shows a blank page instead of USB Sound Device to be managed.

$ dmesg | grep snd
[    6.986750] usbcore: registered new interface driver snd-usb-audio

$ cat /proc/asound/cards
0 [audiocodec     ]: audiocodec - audiocodec
                      audiocodec
1 [ahubdam        ]: ahubdam - ahubdam
                      ahubdam
2 [ahubhdmi       ]: ahubhdmi - ahubhdmi
                      ahubhdmi
3 [Device         ]: USB-Audio - USB Audio Device
                      C-Media Electronics Inc. USB Audio Device at usb-5200000.usb-1.2, full speed

~$  lsmod | grep snd_usb
snd_usb_audio         278528  0
snd_hwdep              20480  1 snd_usb_audio
snd_usbmidi_lib        36864  1 snd_usb_audio
snd_rawmidi            40960  1 snd_usbmidi_lib
mc                     53248  6 sunxi_cedrus,videodev,snd_usb_audio,videobuf2_v4l2,videobuf2_common,v4l2_mem2mem

$ ps -A | grep pulse
   1613 ?        00:12:16 pulseaudio

Despite the USB Audio device is seen by the OPi Zero 3 device, yet it is not regognized by pulseaudio so no audio data can be exchanged between OPi and X6100 rig.

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 Author| Published in 2023-11-13 21:54:21 | Show all floors
At last I understood the reason behind the problem that was the definition of the usb device in /usr/share/alsa-card-profile that was missing. I added the line "load-module module-alsa-sink device=hw:3,0" and now all works fine (3 was the index of the response to cat /proc/asound/card where the USB Audio device was shown). Actually OrangePI Zero 3 can manage USB Audio devices and problem is solved!
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