add mpd with pipewire

sound/mpd_pipewire.md

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+---
+title: "mpd"
+tags: [ "sound", "pipewire" ]
+requirements: [ "pipewire" ]
+---
+# Setup
+
+## Configuration
+
+This is a minimum configuration file for /etc/mpd.conf
+
+> music_directory		"/var/lib/mpd/music"
+> 
+> playlist_directory "/var/lib/mpd/playlists"
+> 
+> db_file "/var/lib/mpd/mpd.db"
+> 
+> 
+> pid_file "/run/mpd/mpd.pid"
+> 
+> state_file "/var/lib/mpd/mpdstate"
+> 
+> 
+> user "mpd"
+> 
+> audio_output {
+> 	type		"pulse"
+> 	name		"My Pulse Output"
+> }
+> 
+
+## Set Pulseaudio to Run System-Wide
+
+
+```bash
+sudo mkdir -p /etc/pipewire/pipewire-pulse.conf.d
+
+cat > /etc/pipewire/pipewire-pulse.conf.d/pulse-server.conf << "EOF"
+pulse.properties = {
+    server.address = [
+        "unix:native"
+        "tcp:4713"                         # IPv4 and IPv6 on all addresses
+    ]
+}
+EOF
+
+
+```
+
+Give `mpd` access to pulse:
+
+```sh
+grep pulse /etc/group | cut -d: -f1
+
+grep pulse /etc/group | cut -d: -f1 | while read g; do
+    sudo usermod -aG $g mpd
+done
+```
+
+Working with mpd will be easier if you have access to its files, so maybe:
+
+```sh
+sudo usermod -aG mpd $USER
+```
+
+Remember to reboot.
+
+# Troubleshooting
+
+Check pulse is working.
+
+```sh
+ss | grep 4713
+```
+
+# Notifications (AUR)
+
+Install `mpd-notification` and then start the service:
+
+```sh
+systemctl --user enable mpd-notification
+```
+

sound/pipewire.md

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+---
+title: "pipewire"
+tags: [ "sound" ]
+---
+
+Install `wireplumber` and `pipewire`, then add your user to any `pipewire` group.
+
+```sh
+sudo ln -s /usr/share/examples/pipewire/20-pipewire-pulse.conf /etc/pipewire/pipewire.conf.d/20-pipewire-pulse.conf
+
+sudo ln -s /usr/share/examples/wireplumber/10-wireplumber.conf /etc/pipewire/pipewire.conf.d/10-wireplumber.conf
+```