Configuring your sound card

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

If you are using WiFi, turn off WiFi Power Management.

$ sudo iwconfig wlan0 power off

Configure the device tree overlay by editing boot config.

$ sudo nano /boot/config.txt

Remove the following line if it exists. This will disable the onboard sound card.

dtparam=audio=on

Add the following line to the end of the file.

dtoverlay=hifiberry-dac

Reboot your Pi and make sure device shows up.

$ sudo reboot now

$ 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.

$ sudo reboot now
$ alsamixer

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

Setting up Spotify Connect using librespot

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

First, install Rust and Cargo using rustup.

$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Source the cargo env file to add the cargo binary into your PATH.

$ source $HOME/.cargo/env

Now, install git and build dependencies.

$ sudo apt install git build-essential libasound2-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. 🙂
$ nano connect/src/spirc.rs
Look for const VOLUME_STEPS and change that line and the following line to this:
const VOLUME_STEPS: i64 = 16;
const VOLUME_STEP_SIZE: u16 = 4096; // (u16::MAX + 1) / VOLUME_STEPS

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

$ cargo build --release

Now, let's create a system service for librespot.

sudo nano /etc/systemd/system/librespot.service

Copy the following into the service configuration file.

[Unit]
Description=Spotify Connect daemon
StartLimitIntervalSec=0
Documentation=https://github.com/librespot-org/librespot
After=sound.target
After=network-online.target

[Service]
ExecStart=/home/pi/librespot/target/release/librespot -u [spotify_username] -p [spotify_password] -n "Librespot" -b 320 -c /tmp/librespot
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target

Now we can start the service.

$ sudo systemctl start librespot

And set it to start automatically on every boot.

$ sudo systemctl enable librespot

You can check the status of the service at any time by running the following command.

$ systemctl status librespot

Setting up Airplay using Shairport Sync

The following is modified from the install instructions located at https://github.com/mikebrady/shairport-sync/blob/master/INSTALL.md.

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

$ sudo apt install build-essential git xmltoman
$ sudo apt install autoconf automake libtool libdaemon-dev libpopt-dev libconfig-dev
$ sudo apt install libasound2-dev
$ sudo apt install avahi-daemon libavahi-client-dev
$ sudo apt install libssl-dev
$ sudo apt install libsoxr-dev

$ autoreconf -i -f
$ ./configure --sysconfdir=/etc --with-alsa --with-avahi --with-ssl=openssl --with-soxr --with-systemd
$ make
$ sudo make install

Now, edit this file:

sudo nano /etc/shairport-sync.conf

Change these values:

general = {
	name = "whatever you want!";
	interpolation = "soxr";
};

Now we can start the service.

$ sudo systemctl start shairport-sync

And set it to start automatically on every boot.

$ sudo systemctl enable shairport-sync

You can check the status of the service at any time by running the following command.

$ systemctl status shairport-sync

Avoiding conflicts over the sound card

If you have both librespot and shairport-sync running, they'll fight over the sound card and you'll have to manually stop one before using the other. The solution to this is to stop librespot every time shairport-sync begins playing audio. See discussion here: mikebrady/shairport-sync#152.

First, add a sudoer file for shairport-sync by copying the default sudoer file.

sudo cp /etc/sudoers.d/010_pi-nopasswd /etc/sudoers.d/010_shairport-sync-nopasswd

Now edit that file.

$ sudo nano /etc/sudoers.d/010_shairport-sync-nopasswd

Change the username to give shairport-sync permission to use sudo

shairport-sync ALL=(ALL) NOPASSWD: ALL

Now edit the shairport-sync config again.

$ sudo nano /etc/shairport-sync.conf

Find the section called "sessioncontrol" and make it look like this.

sessioncontrol =
{
        run_this_before_play_begins = "/usr/bin/sudo systemctl stop librespot";
        run_this_after_play_ends = "/usr/bin/sudo systemctl start librespot";
};

Finally, reboot for your changes to take effect.

$ sudo reboot now

Great job! 🥃

dialupdev/Raspberry Pi Music Server.md

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