Note, this is optional!
Now that for these instructions are setting up PulseAudio at the system level for a dedicated audio player.
sudo apt install pulseaudio pulsemixer pulseaudio-utils ubuntu-sounds
sudo systemctl --global disable pulseaudio.service pulseaudio.socket
Create systemd file /etc/systemd/system/pulseaudio-system.service
[Unit]
Description=PulseAudio Daemon
[Install]
WantedBy=multi-user.target
[Service]
Type=simple
PrivateTmp=true
ExecStart=/usr/bin/pulseaudio --system --realtime --disallow-exit --no-cpu-limit
sudo nano /etc/pulse/system.pa
Find: module-native-protocol-unix/load-module
Change to: module-native-protocol-unix auth-anonymous=1
sudo usermod -aG pulse-access root
sudo systemctl daemon-reload
sudo systemctl enable pulseaudio-system
sudo systemctl start pulseaudio-system