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sound - PulseAudio not detecting any devices - Ask Ubuntu
https://askubuntu.com/questions/859773/pulseaudio-not-detecting-any-devices
Remove the configuration file of PulseAudio: rm -r ~/.config/pulse. Kill all instances of PulseAudio; pulseaudio -k. Shut down (not restart) your system. (May not be necessary but I did it anyway to flush my RAM memory just in case): Disconnect charger, then press and hold the power button or your PC/laptop for about 15-20 secs.
Linux – How to i can create a virtual pulseaudio soundcard ...
https://itectec.com/superuser/linux-how-to-i-can-create-a-virtual-pulseaudio-soundcard-on-linux-with-no-audio-hardware/
Pulseaudio can create various sinks (what you call "virtual soundcards", but sinks are for output, sources are for input, and they also get associated to real sound hardware).. Have a look at the module list which includes the sinks, and syntax examples. You have the choice between using RTP/SDP, ROAP.. You can also access a pulseaudio server on the host via the native procotol, …
[Solved] PulseAudio does not use hardware volume control ...
https://bbs.archlinux.org/viewtopic.php?id=260104
Unfortunately PulseAudio doesn't use hardware volume control for my USB soundcard (Apogee Groove). The HW_VOLUME_CTRL flag is not listed when I run pacmd list-cards. I can change the hardware volume using alsamixer and then selecting the Groove sound card. Apparently PulseAudio is not able to detect the hardware volume mixer:
How to Fix pulseaudio issues in Linux - Appuals.com
https://appuals.com/how-to-fix-pulseaudio-issues-in-linux/
Restarting the pulseaudio Service Without Logging Out. Open a terminal window by holding down CTRL, ALT and T or select it from the application or Dash menu appropriate for the type of graphical user interface you’re using. You won’t need administrator access for most of these commands, so make sure that you have a $ prompt if you’re using the bash shell.
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