При запуске mpd выдает:
listen: bind to '0.0.0.0:6600' failed: Address already in use (continuing anyway, because binding to '[::]:6600' succeeded)
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
sudo grep -i bind /etc/mpd.conf
bind_to_address "localhost"
#bind_to_address "/var/run/mpd/socket"
из-за этого не работает ncmpcpp.