My pulseaudio configuration for Raspbian and mpd

default.pa

# /etc/pulse/default.pa
# only showing here the relevant changes

.......
load-module module-native-protocol-unix auth-group=audio socket=/tmp/pulse-server
.......

load-module module-native-protocol-tcp auth-ip-acl=127.0.0.1;192.168.1.0/24 auth-anonymous=1
load-module module-zeroconf-publish

global-client.conf

; /etc/pulse/client.conf
autospawn = no

mpd-client.conf

# /var/lib/mpd/.config/pulse/client.conf
autospawn = no
auto-connect-localhost = yes

mpd.conf

# /etc/mpd.conf
# only showing relevant changes

.....
audio_output {
        type            "pulse"
        name            "MPD Pulse Output"
        server          "127.0.0.1"
#       sink            ""      # optional
}

pulseaudio.service

# /lib/systemd/system/pulseaudio.service
# start with: systemctl start pulseaudio.service
# enable on boot: systemctl enable pulseaudio.service 
[Unit]
Description=Pulseaudio sound server
After=avahi-daemon.service network.target

[Service]
User=mpd
Group=audio
Type=simple
ExecStart=/usr/bin/pulseaudio --disallow-exit --realtime --no-cpu-limit
ExecReload=/bin/kill -HUP $MAINPID
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target