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PulseAudio - Debian Wiki
https://wiki.debian.org/PulseAudio
As of Debian 8 (Jessie, in 2016), you rarely need to install pulseaudio by hand as it is a dependency of the most popular desktops If you need to install it manually, apt-get install pulseaudioshould "just work" in every release since Debian 6 (Squeeze). Pulseaudio becomes the default when the package is installed. Everything will use i…
How do I configure PulseAudio for 7.1 Surround Sound …
https://unix.stackexchange.com/questions/111428/how-do-i-configure-pulseaudio-for-7-1-surround-sound-over-hdmi
Restart PulseAudio: pulseaudio -k, as your normal user, assuming you're using per-user daemons (the default). Start it up again, even a simple aplay -l will work. Switch to the 7.1 profile. Personally, I used pactl set-card-profile 0 "output:hdmi-surround-71" to do this, but a GUI will work perfectly well, too. Run speaker-test -c 8 -t w. It should start announcing speaker names, hopefully the …
Linux: How To enable HRTF virtual 3D surround sound with ...
https://frankbaier.medium.com/linux-how-to-enable-hrtf-virtual-3d-surround-sound-with-pulseaudio-5b74a6493a66
Inside the PulseAudio Volume Control application you should see a new interface with the name Virtual Surround Sound Sink Stream …
PulseAudio/Examples - ArchWiki
https://wiki.archlinux.org/title/PulseAudio/Examples
Surround sound systems. Many people have a surround sound card, but have speakers for just two channels, so PulseAudio cannot really default to a surround sound setup. To enable all of the channels, edit /etc/pulse/daemon.conf: uncomment the default-sample-channels line (i.e. remove the semicolon from the beginning of the line) and set the value to 6
Getting DTS 5.1+ sound via S/PDIF or HDMI using PulseAudio ...
https://blogs.gentoo.org/mgorny/2021/07/25/getting-dts-5-1-sound-via-s-pdif-or-hdmi-using-pulseaudio/
Getting DTS 5.1+ sound via S/PDIF or HDMI using PulseAudio. While PCs still usually provide a full set of analog jacks capable of outputting a 5.1 audio, other modern hardware (such as TVs) is usually limited to digital audio outputs (and sometimes analog outputs limited to stereo sound). These outputs are either S/PDIF (coaxial or optical) or HDMI.
pulseaudio - How to enable 5.1 sound on Ubuntu 20.04 - …
https://askubuntu.com/questions/1304002/how-to-enable-5-1-sound-on-ubuntu-20-04
I found it. start alsamixer and then hit F6 to select sound card. select HDA Intel PCH and then you see this: then click right arrow until you get to the channels and click up arrow to set it to 6 channel. Now you will get the full surround mode and it works great. I did that after making the changes suggested in the previous answer, so do that too.
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