Там что-то вроде такого:

audio_output {
        type            "alsa"
        name            "My ALSA Device"
#       device          "hw:0,0"        # optional
#       mixer_type      "hardware"      # optional
#       mixer_device    "default"       # optional
#       mixer_control   "PCM"           # optional
#       mixer_index     "0"             # optional
}

audio_output {
        type            "pulse"
        name            "My Pulse Output"
#       server          "remote_server"         # optional
#       sink            "remote_server_sink"    # optional
}

audio_output {
       type   "fifo"
       name   "Visualizer feed"
       path   "/tmp/mpd.fifo"
       format "44100:16:2"
}