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pulseaudio(1) — pulseaudio — Debian buster — Debian …
https://manpages.debian.org/buster/pulseaudio/pulseaudio.1.en.html
User pulse, group pulse: if PulseAudio is running as a system daemon (see --system above) and is started as root the daemon will drop privileges and become a normal user process using this user and group. If PulseAudio is running as a user daemon this user and group has no meaning.
Debian -- Details of package pulseaudio in buster
https://packages.debian.org/buster/pulseaudio
PulseAudio, previously known as Polypaudio, is a sound server for POSIX and WIN32 systems. It is a drop in replacement for the ESD sound server with much better latency, mixing/re-sampling quality and overall architecture. These are some of PulseAudio's features:
How-To: Pulseaudio - Debian User Forums
https://forums.debian.net/viewtopic.php?t=12497
For me only asound.conf works but it may be different for other people especially if you are not on debian. 4.Try a restart. 5.Try the commands "sudo dpkg-reconfigure pulseaudio" and "sudo dpkg-reconfigure pulseaudio-utils" to set things back to default. 6.Try a different device as stated in the Tinkering section.
pulseaudio, derivative problems
https://groups.google.com/g/linux.debian.user/c/6a0_tXFAhAo
Now pulseaudio won't work at all, in addition to several other programs. Issuing 'pulseaudio' returns 'pid.c: Daemon already running; main.c: pa_pid_file_create() failed.' however if I issue 'pavucontrol', a dialog box flashes for an instant and then disappears, and the volume control gui tool never opens.
How-To: Pulseaudio - Page 1 - Debian User Forums
https://forums.debian.net/viewtopic.php?t=12497&start=15
You should use pulseaudio -D as user, not as root (systemwide) and then you don't need to change the group-file (on Lenny the pulse user added itself to the audio group). Also you need to add yourself to the pulse-rt group only if you want to use the realtime functions, which pose a security risk. Top. DrumScum.
Running PulseAudio as System-Wide Daemon – PulseAudio
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/SystemWide/
When PulseAudio starts in the system mode, it will change its user and group from root to pulse in order to not have too many privileges. The pulse user needs to be in the audio and bluetooth groups in order to be able to use ALSA and bluetooth devices. All users that need access to PulseAudio have to be in the pulse-access group, even root.
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