Multiroom Airplay speaker Using Raspberry Pi Zero W

#Update and upgrade the OS first
sudo apt-get update
sudo apt-get upgrade

#check dac card number using
aplay -l

#change the config file to set USB DAC a default device. If you are using any Pi #Hats, follow the appropriate steps.
sudo nano /etc/asound.conf

#paste the following and save
pcm.!default  {
 type hw card 1
}
ctl.!default {
 type hw card 1
}

#Add Wifi Credentials and reboot
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
#add the following
network={
ssid="Your_Wifi_SSID"
psk="Your_wifi_password"
}

sudo reboot

#Install Dependencies for Shairport-sync.

sudo apt-get install build-essential

sudo apt-get install git

sudo apt-get install autoconf libtool libdaemon-dev libasound2-dev libpopt-dev libconfig-dev libavahi-client-dev

sudo apt-get install libssl-dev

sudo apt-get install libsoxr-dev

#Build and Install Shairport-sync

git clone https://github.com/mikebrady/shairport-sync.git

cd shairport-sync

#Autoreconf will be a bit slow so do not panic
autoreconf -i -f

./configure --with-alsa --with-avahi --with-ssl=openssl --with-metadata --with-soxr --with-systemd

make

getent group shairport-sync &>/dev/null || sudo groupadd -r shairport-sync >/dev/null

getent passwd shairport-sync &> /dev/null || sudo useradd -r -M -g shairport-sync -s /usr/bin/nologin -G audio shairport-sync >/dev/null

sudo make install

#Autostart Shairport-sync at startup
#Add shairport-sync after exit
sudo nano /etc/rc.local

#Change Name of the Shairport-sync
sudo nano /usr/local/etc/shairport-sync.conf

#Complete installation and reboot
sudo reboot