mpd error

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
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_card_driver return                                             ed error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_concat returned er                                             ror: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_refer returned err                                             or: No such file or directory
ALSA lib conf.c:4720:(snd_config_expand) Evaluate error: No such file or directo                                             ry
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Error opening default ALSA device: No such file or directory
output: Attempting to detect a oss audio device
oss: Error opening OSS device "/dev/dsp": No such file or directory
oss: Error opening OSS device "/dev/sound/dsp": No such file or directory
output: Attempting to detect a pulse audio device
Assertion 'm' failed at pulse/thread-mainloop.c:232, function pa_threaded_mainlo                                             op_get_api(). Aborting.
Aborted