[pulseaudio-discuss] New release - mpd has stopped working with same user

[Damir Jelić]

> I would not rule that out. I use systemd which basically just starts
> "mpd --no-daemon" as root. Thanks for trying to help and checking
> things out, will await more comments from others.

Have you tried starting mpd manually?
I think the "as root" part could be problematic.

You can also try to modify the mpd.service file, just
add User=myUserName so it starts mpd as your user.