but then i realized that if you have mpd encode as vorbis (which is the default now) instead of mp3, you get a janky one for free because icecast will add audio players to its list of streams (you also get better metadata as a bonus)
now you can listen to the Silmarillion audiobook AND my playlist that had the working title 'music to have anxiety to' at the SAME time: https://radio.crimes.consulting/