#+title: Squeezelite

* Installation

Install OS: Raspberry Pi OS Lite (Debian GNU/Linux 12: bookworm)

Setup SSH Authentication
#+begin_src bash :eval no
# On Raspberry Pi
ssh-keygen -t ed25519 -f ~/.ssh/lms_tunnel -N ""
cat ~/.ssh/lms_tunnel.pub
#+end_src

Copy the public key on =homelab=

Change =.ssh/config=
#+begin_src conf
Host homelab
    hostname 82.66.44.13
    Port 22
    user thomas
    IdentityFile ~/.ssh/lms_tunnel
#+end_src

Test the SSH connection:
#+begin_src bash :eval no
ssh homelab
#+end_src

Install packages:
#+begin_src bash :eval no
sudo apt update
sudo apt install autossh avahi-daemon
#+end_src

Create service: =/etc/systemd/system/lms-tunnel.service=
#+begin_src conf
[Unit]
Description=LMS SSH Tunnel
After=network.target

[Service]
User=pi
ExecStart=/usr/bin/autossh -M 0 -N \
  -o "ServerAliveInterval 30" \
  -o "ServerAliveCountMax 3" \
  -o "ExitOnForwardFailure yes" \
  -o "IdentitiesOnly yes" \
  -o "TCPKeepAlive yes" \
  -o "Compression yes" \
  -i /home/pi/.ssh/lms_tunnel \
  -L 0.0.0.0:9000:localhost:9000 \
  -L 0.0.0.0:3483:localhost:3483 \
  -L 0.0.0.0:9090:localhost:9090 \
  thomas@82.66.44.13

Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target
#+end_src

Enable the service: =sudo systemctl enable --now lms-tunnel.service=

Set Up Avahi for LMS Service Discovery: =/etc/avahi/services/squeezebox.service=
#+begin_src conf
<?xml version="1.0" standalone='no'?>
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
  <name>Logitech Media Server</name>
  <service>
    <type>_slimdevices._tcp</type>
    <port>3483</port>
  </service>
</service-group>
#+end_src

Restart Avahi: =sudo systemctl restart avahi-daemon=.

#+begin_src bash :eval no
# Check tunnel status
sudo systemctl status lms-tunnel.service

# Check if ports are being forwarded
sudo netstat -tulpn | grep -E '9000|3483|9090'
#+end_src

Troubleshooting: =sudo systemctl status lms-tunnel.service=

Create the service for Holo Player service: =/etc/systemd/system/holo-audio-player.service=
#+begin_src yaml
[Unit]
Description=Holo Audio DAC Squeezebox Player
After=network-online.target sound.target lms-tunnel.service
Wants=network-online.target
Requires=lms-tunnel.service

[Service]
Type=simple
User=root
ExecStart=/usr/bin/squeezelite \
  -o plughw:CARD=Enhanc,DEV=0 \
  -s localhost \
  -n HoloAudioDAC \
  -a 2000:4:24:1 \
  -b 4096:8192 \
  -r 44100,48000,96000,192000 \
  -p 55 \
  -C 5 \
  -d all=info \
  -f /var/log/squeezelite.log

Restart=always
RestartSec=10
Nice=-10
LimitRTPRIO=99
LimitMEMLOCK=infinity

[Install]
WantedBy=multi-user.target
#+end_src

=sudo systemctl enable --now holo-audio-player.service=

To see the logs in real time: =tail -f /var/log/squeezelite.log=