To support play DSD dff file inrealtime mode, we must add dsdiff plugin in mpd config file.

decoder {
  plugin “ffmpeg”
  enable “yes”
}

decoder {
  plugin “dsdiff”
  enable “yes”
}

cat mpd.conf

music_directory     “/music”
playlist_directory “/opt/local/run/mpd/playlists”
db_file            “/opt/local/run/mpd/database”
log_file       “/opt/local/run/mpd/log”
pid_file       “/opt/local/run/mpd/mpd.pid”
state_file         “/opt/local/run/mpd/state”
sticker_file      “/opt/local/run/mpd/sticker.sql”

user           “root”
group          “root”
bind_to_address         “any”
#bind_to_address       “localhost”
bind_to_address         “/opt/local/run/mpd/socket”
port           “6600”

# default=notice
# secure=info

log_level      “default”
#log_level              “secure”
#log_level              “verbose”
#log_level              “warning”
#log_level              “error”



restore_paused         “no”
save_absolute_paths_in_playlists  “no”
metadata_to_use  “artist,album,title,track,name,genre,date,composer,performer,disc”

auto_update        “yes”
auto_update_depth      “8”


follow_outside_symlinks        “yes”
follow_inside_symlinks      “yes”



zeroconf_enabled       “yes”
zeroconf_name          “Music Player @ %h”


#password                        “password@read,add,control,admin”
default_permissions         “read,add,control,admin”



#database {
#       plugin “proxy”
#       host “other.mpd.host”
#       port “6600”
#}


decoder {
  plugin “ffmpeg”
  enable “yes”
}

decoder {
  plugin “dsdiff”
  enable “yes”
}

#input {
#        plugin “curl”
#       proxy “proxy.isp.com:8080”
#       proxy_user “user”
#       proxy_password “password”
#}


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

#audio_output {
#    type                    “fifo”
#    name                    “my_fifo”
#    path                    “/tmp/mpd.fifo”
#    format                  “44100:16:2”
#}


# creative usb card
#audio_output {
#        type            “alsa”
#        name            “MP3”
#        device          “hw:CARD=MP3,DEV=0”
#        mixer_type      “software”      # optional
#}


#audio_output {
#        type            “alsa”
#        name            “TerraTec”
#        device          “iec958:CARD=Device,DEV=0”
#        mixer_type      “software”      # optional
#}

#audio_output {
#        type            “alsa”
#        name            “C-Media”
#        device          “iec958:CARD=Set,DEV=0”
#        mixer_type      “hardware”      # optional
#}

# Via Winner AD-86D amplifer
audio_output {
        type            “alsa”
        name            “Audio”
        device          “hw:CARD=AUDIO,DEV=0”
        mixer_type      “software”    
}



# via Jack Daemon
#audio_output {
#        type “jack”
#        name “My Jack Output”
#        mixer_type      “software”
#}



#
# An example of an OSS output:
#
#audio_output {
#   type       “oss”
#   name       “My OSS Device”
##  device     “/dev/dsp” # optional
##  mixer_type      “hardware” # optional
##  mixer_device   “/dev/mixer”   # optional
##  mixer_control  “PCM”      # optional
#}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
#   type       “shout”
#   encoder    “vorbis”       # optional
#   name       “My Shout Stream”
#   host       “localhost”
#   port       “8000”
#   mount      “/mpd.ogg”
#   password   “hackme”
#   quality    “5.0”
#   bitrate    “128”
#   format     “44100:16:1”
##  protocol   “icecast2”     # optional
##  user       “source”       # optional
##  description “My Stream Description”    # optional
##  url     “http://example.com”   # optional
##  genre      “jazz”         # optional
##  public     “no”           # optional
##  timeout    “2”        # optional
##  mixer_type      “software”     # optional
#}
#
# An example of a recorder output:
#
#audio_output {
#   type       “recorder”
#   name       “My recorder”
#   encoder    “vorbis”       # optional, vorbis or lame
#   path       “/opt/local/run/mpd/recorder/mpd.ogg”
##  quality    “5.0”          # do not define if bitrate is defined
#   bitrate    “128”          # do not define if quality is defined
#   format     “44100:16:1”
#}
#
# An example of a httpd output (built-in HTTP streaming server):
#
#audio_output {
#   type       “httpd”
#   name       “My HTTP Stream”
#   encoder    “vorbis”       # optional, vorbis or lame
#   port       “8000”
#   bind_to_address “0.0.0.0”      # optional, IPv4 or IPv6
##  quality    “5.0”          # do not define if bitrate is defined
#   bitrate    “128”          # do not define if quality is defined
#   format     “44100:16:1”
#   max_clients “0”        # optional 0=no limit
#}
#
# An example of a pulseaudio output (streaming to a remote pulseaudio server)
#
#audio_output {
#   type       “pulse”
#   name       “My Pulse Output”
##  server     “remote_server”    # optional
##  sink       “remote_server_sink”   # optional
#}
#
# An example of a winmm output (Windows multimedia API).
#
#audio_output {
#   type       “winmm”
#   name       “My WinMM output”
##  device     “Digital Audio (S/PDIF) (High Definition Audio Device)” # optional
#       or
##  device     “0”     # optional
##  mixer_type “hardware” # optional
#}
#
# An example of an openal output.
#
#audio_output {
#   type       “openal”
#   name       “My OpenAL output”
##  device     “Digital Audio (S/PDIF) (High Definition Audio Device)” # optional
#}
#
# An example of an sndio output.
#
#audio_output {
#   type       “sndio”
#   name       “sndio output”
#   mixer_type “hardware”
#}
#
# An example of an OS X output:
#
#audio_output {
#   type       “osx”
#   name       “My OS X Device”
##  device     “Built-in Output”  # optional
##  channel_map      “-1,-1,0,1”   # optional
#}
#
## Example “pipe” output:
#
#audio_output {
#   type       “pipe”
#   name       “my pipe”
#   command    “aplay -f cd 2>/dev/null”
## Or if you’re want to use AudioCompress
#   command    “AudioCompress -m | aplay -f cd 2>/dev/null”
## Or to send raw PCM stream through PCM:
#   command    “nc example.org 8765”
#   format     “44100:16:2”
#}
#
## An example of a null output (for no audio output):
#
#audio_output {
#   type       “null”
#   name       “My Null Output”
#   mixer_type      “none”         # optional
#}
#
###############################################################################


# Normalization automatic volume adjustments ##################################
#
# This setting specifies the type of ReplayGain to use. This setting can have
# the argument “off”, “album”, “track” or “auto”. “auto” is a special mode that
# chooses between “track” and “album” depending on the current state of
# random playback. If random playback is enabled then “track” mode is used.
# See <http://www.replaygain.org> for more details about ReplayGain.
# This setting is off by default.
#
#replaygain        “album”
#
# This setting sets the pre-amp used for files that have ReplayGain tags. By
# default this setting is disabled.
#
#replaygain_preamp     “0”
#
# This setting sets the pre-amp used for files that do NOT have ReplayGain tags.
# By default this setting is disabled.
#
#replaygain_missing_preamp “0”
#
# This setting enables or disables ReplayGain limiting.
# MPD calculates actual amplification based on the ReplayGain tags
# and replaygain_preamp / replaygain_missing_preamp setting.
# If replaygain_limit is enabled MPD will never amplify audio signal
# above its original level. If replaygain_limit is disabled such amplification
# might occur. By default this setting is enabled.
#
#replaygain_limit      “yes”
#
# This setting enables on-the-fly normalization volume adjustment. This will
# result in the volume of all playing audio to be adjusted so the output has
# equal “loudness”. This setting is disabled by default.
#
#volume_normalization      “no”
#
###############################################################################

# Character Encoding ##########################################################
#
# If file or directory names do not display correctly for your locale then you
# may need to modify this setting.
#
#filesystem_charset        “UTF-8”
#
###############################################################################