SpaceMusic

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SpaceMusic Release status: obsolete [box doku]
Description
Author(s)	Severin

What is it?

We have an awesome sound system at the space. It is attached to the Docker running an instance of mpd (music player daemon), as well as targets for AirPlay, UPnP and Spotify Connect.

Settings

• Hostname: music.intern.munichmakerlab.de
• IP: 10.10.20.66
• Port: 6600
• Password: none

How to use

You can control mpd using a media player client software. We recommend gmpc for Mausschubsers and ncmpc for the nerds.

ncmpc -h 10.10.20.50

Alternatively, there's a webinterface at http://music.intern.munichmakerlab.de

MQTT Control

The MPD can also be controlled via MQTT. Therefore, we have a service running that translates MQTT messages into MPD commands. It's currently running on the Docker machine (10.10.20.66), and the code that's used can be found at https://github.com/munichmakerlab/mqtt2mpd

Topics

• mumalab/mpd/command: understands the following commands: play, pause, next, previous, toggle, volume up, volume down

Implementation Details

On docker01, we are running the following services:

• shairport-sync for AirPlay
  • Installed via the standard Debian repository
  • Changed name in /etc/shairport-sync.conf
• Rygel for UPnP Streaming
  • Installed from Debian repository
  • Configuration see below
• spotifyd for Spotify Connect
  • Compiled from source, see below
• MPD
  • Installed from Debian repository
• YMPC as MPD Web Frontend
  • Running as a docker container

Rygel

• Install via Debian repo

apt install rygel rygel-playbin

• Create dedicated user and group

mkdir /var/lib/rygel
groupadd -r rygel
useradd -r -d /var/lib/rygel -g rygel -G audio rygel
chown rygel:rygel /var/lib/rygel

• Create Unitfile /lib/systemd/system/rygel.service

[Unit]
Description=Rygel DLNA server
After=syslog.target

[Service]
User=rygel
Group=rygel
ExecStart=/usr/bin/rygel
# ExecStart=/usr/bin/wrap-dbus /usr/bin/rygel

[Install]
WantedBy=multi-user.target

• Enable and start systemd service

systemctl daemon-reload
systemctl enable rygel
systemctl start rygel

spotifyd

• Install prerequisites

apt install libasound2-dev libssl-dev libpulse-dev libdbus-1-dev

• Install rust -> https://rustup.rs/
• Download and compile

git clone https://github.com/Spotifyd/spotifyd.git
cd spotifyd
cargo build --release
cp target/release/spotifyd /usr/local/bin/

• Create group and user

mkdir /var/lib/spotifyd
groupadd -r spotifyd
useradd -r -d /var/lib/spotifyd -g spotifyd -G audio spotifyd
chown spotifyd:spotifyd /var/lib/spotifyd

• Create Configuration file /etc/spotifyd.conf

[global]
# The name that gets displayed under the connect tab on
# official clients. Spaces are not allowed!
device_name = Soundsystem@MuMaLab

# The audio bitrate. 96, 160 or 320 kbit/s
bitrate = 160

• Create Unit file /lib/systemd/system/spotifyd.service

[Unit]
Description=Spotify Connect server
After=syslog.target

[Service]
User=spotifyd
Group=spotifyd
ExecStart=/usr/local/bin/spotifyd --no-daemon

[Install]
WantedBy=multi-user.target

• Enable and start systemd service

systemctl daemon-reload
systemctl enable spotifyd
systemctl start spotifyd