[kenshin421@ArchLinux ~]$ mpd
listen: bind to '0.0.0.0:6600' failed: Address already in use (continuing anyway, because binding to '[::]:6600' succeeded)
daemon: cannot init supplementary groups of user "kenshin421": Operation not permitted
output: No "audio_output" defined in config file
output: Attempt to detect audio output device
output: Attempting to detect a alsa audio device
output: Successfully detected a alsa audio device