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PulseAudio - Ubuntu Wiki
https://wiki.ubuntu.com/PulseAudio
Using PulseAudio For Ubuntu environments that use pulseaudio, Ubuntu has its own custom sound indicator that will allow you to select the preferred device and control the volume of each application. If you would prefer to try pulseaudio's generic control GUI, install the pavucontrol package and launch it with terminal command: pavucontrol
What is PulseAudio Ubuntu?
https://frameboxxindore.com/linux/what-is-pulseaudio-ubuntu.html
How do I open PulseAudio in Ubuntu? It is available in the official package repository of Ubuntu 18.04 LTS, but not installed by default. Now press y and then press <Enter> to continue. PulseAudio Volume Control should be installed. Now you can open PulseAudio Volume Control from the Application Menu of your Ubuntu 18.04 LTS.
How to Use PulseAudio to Manage Sounds on Ubuntu 18.04
https://linuxhint.com/pulse_audio_sounds_ubuntu/
Run the following command to install PulseAudio Volume Control on Ubuntu 18.04 LTS: $ sudo apt install pavucontrol Now press y and then press <Enter> to continue. PulseAudio Volume Control should be installed. Now you can open PulseAudio Volume Control from the Application Menu of your Ubuntu 18.04 LTS.
How to reset PulseAudio and ALSA on Ubuntu …
https://www.mind-overflow.net/post/how-to-reset-pulseaudio-and-alsa-on-ubuntu/
The very simple process As long as your audio configuration and settings were working when you installed Ubuntu, and the malfunctioning state is caused by your misconfiguration and/or fault, restoring the audio driver to default state might actually be helpful. First of all, completely purge and remove your pulseaudio and alsa packages by running:
Pulseaudio not working kernel driver broken - Ask Ubuntu
https://askubuntu.com/questions/1214154/pulseaudio-not-working-kernel-driver-broken
At startup ubuntu stayed checking whether it worked and it took a long time to boot (several start jobs were started). If I try to start it from console I get the following output. W: [pulseaudio] alsa-mixer.c: Your kernel driver is broken: it reports a volume range from 0 to 0 which makes no sense.
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