Setup a Spotify Connect client

librespot_config_on_raspberry_pi_3.sh

#!/bin/bash

# Setup a Spotify Connect client
# 
# Hardware:
# - RaspberryPi3
# - Creative Sound Blaster Play2
#
# Resources:
# https://github.com/plietar/librespot


# install dependencies
sudo apt-get install build-essential portaudio19-dev git
curl https://sh.rustup.rs -sSf | sh

git clone git@github.com:plietar/librespot.git

# /!\ use a fan or any other way to cool down CPU as program is compiling
cd librespot && cargo build --release

ln -s target/release/librespot /usr/local/bin/librespot
cd -

# you need to plugin your USB sound card from here

# list your audio devices and get your card and device identifier
aplay -l

# **** List of PLAYBACK Hardware Devices ****
# card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
#   Subdevices: 1/1
#   Subdevice #0: subdevice #0
# card 1: S2 [Sound Blaster Play! 2], device 0: USB Audio [USB Audio]
#   Subdevices: 1/1
#   Subdevice #0: subdevice #0

# in this example the identifier is "hw:1,0" for card 1, device 0
# note that this address can change and depends on your system setup


# set usb interface as default
# https://github.com/plietar/librespot/issues/69#issuecomment-201951418
sudo cat > /etc/asound.conf <<HEREDOC
pcm.!default {
  type plug
  slave.pcm "hw:1,0"
}
HEREDOC
alsactl --force restore

# test soundcard (dual channel and 48kHz)
speaker-test -c 2 -r 48000

# start librespot client for the first time !
librespot --cache /var/cache/librespot \
          --name HiFi \
          --username <SPOTIFY_USERNAME> \
          --password <SPOTIFY_PASSWORD> \
          --bitrate 320

# add librespot to init.d (autostart on boot)
sudo cat > /etc/init.d/librespot <<HEREDOC
/usr/local/bin/librespot --cache /var/cache/librespot \
                         --name HiFi \
                         --username <SPOTIFY_USERNAME> \
                         --password <SPOTIFY_PASSWORD> \
                         --bitrate 320
HEREDOC

# restart and test
sudo reboot now

add unit file for systemd

[Unit]
Description=Spotify Connect Client
After=network.target alsa-utils.service

[Service]
Type=simple
ExecStart=/usr/local/bin/librespot --name HiFi --username <SPOTIFY_USERNAME> --password <SPOTIFY_PASSWORD> --bitrate 320 --cache /var/cache/librespot
Restart=on-failure

[Install]
Alias=librespot.service

add crontab to empty cache directory every morning at 5am
sudo crontab -e

0 5 * * * rm -r /var/cache/librespot/files/*