First, install Raspbian.

This configuration works with HiFiBerry DACs and the Sabre ES9023 chip.

Configure the device tree overlay by editing boot config.

sudo nano /boot/config.txt

Add the following line to the end of the file.

dtoverlay=hifiberry-dac

Reboot your Pi and make sure device shows up.

$ aplay -l

Look for card 0: sndrpihifiberry. Your card ID may be different from 0.

Create /etc/asound.conf with the following content. Replace 0 with your card ID from above.

pcm.!default {
    type hw
    card 0
}

ctl.!default {
    type hw
    card 0
}

Reboot your Pi and make sure the ALSA settings have taken effect.

$ alsamixer

You should see Card: snd_rpi_hifiberry_dac displayed in the top left corner.

Install https://github.com/librespot-org/librespot using the commands below.

First, install Rust and Cargo using rustup.

curl https://sh.rustup.rs -sSf | sh

Log out of your account and log back in to add the cargo binary into your PATH.

Now, install git and build dependencies.

sudo apt-get install git build-essential portaudio19-dev

Clone the repo and navigate to the directory.

git clone https://github.com/librespot-org/librespot.git
cd librespot

Optional step: Change the number of volume steps from 64 to 16. I prefer this because it matches the iPhone's volume control. 🙂

sh
nano connect/src/spirc.rs

Look for repeated.push(64) and change it to repeated.push(16).

Build librespot. This step will take a very long time on a Raspberry Pi - most likely 30 minutes or more.

sh
cargo build --release

The following is taken from the install instructions located at https://github.com/mikebrady/shairport-sync/tree/development.

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

$ git checkout development
$ autoreconf -i -f
$ ./configure --sysconfdir=/etc --with-alsa --with-pa --with-avahi --with-ssl=openssl --with-soxr --with-systemd

$ make
$ sudo make install
$ sudo systemctl enable shairport-sync

Now, edit this file:

sudo nano /etc/shairport-sync.conf

Change these values:

general = {
	name = "whatever you want!";
};
alsa = {
	output_device = "hw:1,0"; // (or whatever number card,device "sndrpihifiberry" is above)
	interpolation = "soxr";
};

If audio is underflowing, set audio_backend_buffer_desired_length to 22050.

Restart Shairport-sync to apply the new settings.

$ sudo service shairport-sync restart