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+On modern Linux systems most people use ALSA and PulseAudio for sound.
+This tends to work fine. This isn't always how it's been done but it's
+how it's done now.
+
+I'm not an expert on Linux audio and I'm not gonna explain how this all
+works because I don't know myself. However I've noticed a lot of guides
+just gloss over what seem to be important parts of setup, so here it is.
+
+This is also a living document and low quality.
+
+Alpine Wiki says as of 2021-05-19 you'll need:
+
+alsa-utils alsa-utils-doc alsa-lib alsaconf
+
+Alpine splits documentation into their own packages from programs.
+
+Alpine also says to add all system users including root to the audio group.
+
+On Busybox systems this is `addgroup $USER audio`.
+On GNU this is `usermod -aG audio $USER`.
+
+Alpine Wiki tells you to use `alsamixer` to find the ID number of your card
+in F6 menu and then change defaults.ctl.card and defaults.pcm.card in
+/usr/share/alsa/alsa.conf but mine was already the default.
+
+You need to also add and start the alsa service:
+rc-service alsa start
+rc-update add alsa
+
+It looks like I installed gstreamer too.
+
+Now you need pulseaudio. Here's how to do that according to Alpine Wiki, add:
+
+pulseaudio pulseaudio-alsa alsa-plugins-pulse
+
+Make sure you set pulseaudio to start when you need audio.
+It freaks out at you if you try to set it systemwide.
+
+I do this in my bspwmrc for bspwm (and .config/i3/config for i3wm) but
+I've heard this is an awful idea so ask your local user-group.
+
+2021-06-04: This works on artix-openrc.