LED Jukebox

This is LED Jukebox, an audio-reactive system with five LED panels and four speakers.

sample video is here

Hardware Specifications

• Raspberry Pi 4B, 64GB microSD, Raspberry pi os lite(64-bit)
• P2.5 64x64 RGB LED Matrix Panel x 5
• 5V 40A Power Supply x1
• 8Ω 10W Speaker x4
• 10W+10W Stereo USB DAC Amplifier x1
• Neodymium magnets(φ6mm x 3mm) for attaching LED panels and top plate to the main body. x48
• Ceiling outlet connector for power supply. x1
• 3D printed parts. Print the models in the 3d_models directory.
  • main_carrige.stl x1
    • The main body of the jukebox.
  • top_plate.stl x1
    • The top plate of the jukebox. Holds ceiling outlet connecter.
  • speaker_carriage.stl x1
    • The speaker carriage. Holds four speakers.
  • panel_adapter.stl x5
    • The LED panel carriage. Holds five LED panels. Attaches to the main body using magnets.

Dependencies

• Raspotify: Streams Spotify music using an open-source client for Spotify Connect on Raspberry Pi.
• rpi-rgb-led-matrix: Used for controlling the LED panels.
• MQTT: Used for communication between some components.
• PyOpenGL: Used for rendering the visualizer.
• LED-Jukebox-Visualizer: The rendering library for LED-Jukebox.

Setup

1. Clone this repository.

   • cd /usr/local/bin
   • git clone --recursive https://github.com/ubiquitous-o/LED-Jukebox.git
   • Set your .env file in /usr/local/bin/LED-Jukebox/.env.
     • Get your Spotify API credentials from Spotify Developer Dashboard.

       SPOTIFY_CLIENT_ID=<your client id>
       SPOTIFY_SECRET_KEY=<your secret key>
       

2. Install Raspotify as a User Service for using Audio Reactive Scripts.

   • Install Raspotify.
     • sudo apt-get -y install curl && curl -sL https://dtcooper.github.io/raspotify/install.sh | sh
     • Install some audio libraries.
       • sudo apt-get install pipewire libasound2-plugins libportaudio2 portaudio19-dev
   • Stop and Disable Raspotify Service.
     • sudo systemctl stop raspotify.service
     • sudo systemctl disable raspotify.service
   • Create User Service.
     • mkdir -p ~/.config/systemd/user/
     • mkdir -p ~/.cache/raspotify
     • cp service/raspotify.service ~/.config/systemd/user/raspotify.service
     • systemctl --user daemon-reload
     • systemctl --user enable raspotify.service
     • systemctl --user start raspotify.service
   • Set Your Speaker.
     • wpctl status
     • Remember your Sinks ID
     • DEFAULT_SINK_ID=<your id>
     • NODE_NAME=$(pw-cli info $DEFAULT_SINK_ID | grep 'node.name = ' | head -n 1 | cut -d '"' -f 2)
     • MONITOR_SOURCE_NAME="${NODE_NAME}.monitor"
     • Check your monitor source name
       • echo $MONITOR_SOURCE_NAME
       • example: alsa_output.usb-Apple_Computer__Inc._Speakers_p4000-00.analog-stereo.monitor
   • Check for Playing and Recording at the Same Time for Testing.
     • Play spotify music on raspi using Spotify Connect
     • Record playing music
       • PULSE_SOURCE=$MONITOR_SOURCE_NAME arecord -D pulse -r 48000 -f S16_LE -c 2 output.wav

3. Install rpi-rgb-led-matrix

   • Refer to this guide to install the Python bindings: python bindings
   • Build the python bindings:
     • git clone https://github.com/hzeller/rpi-rgb-led-matrix.git
     • cd rpi-rgb-led-matrix/bindings/python/
     • sudo apt-get update && sudo apt-get install python3-dev cython3 -y
     • make build-python
   • Install rpi-rgb-led-matrix into your venv:
     • cd /usr/local/bin/LED-Jukebox
     • python -m venv venv
     • source venv/bin/activate
     • cd rpi-rgb-led-matrix/bindings/python/
     • pip install .
   • Set dtparam=audio=off in /boot/firmware/config.txt file.
   • Add snd_bcm2835 to blacklist

     cat <<EOF | sudo tee /etc/modprobe.d/blacklist-rgb-matrix.conf
     blacklist snd_bcm2835
     EOF
     
     sudo update-initramfs -u

   • Set isolcpus=3 in the end of /boot/firmware/cmdline.txt file.
     • sudo vim /boot/firmware/cmdline.txt
       • example:console=serial0,115200 console=tty1 root=PARTUUID=2b5c324a-02 rootfstype=ext4 fsck.repair=yes rootwait cfg80211.ieee80211_regdom=JP isolcpus=3
   • Reboot your pi.
     • sudo reboot

4. Setup LED-Jukebox

   • Setup System Services
     • Setup MQTT as a system service.
     • sudo apt-get install mosquitto mosquitto-clients
     • sudo systemctl enable mosquitto.service
     • sudo systemctl start mosquitto.service
     • Set MQTT broker service
       • sudo cp service/led-jukebox-mqtt.service /etc/systemd/system/led-jukebox-mqtt.service
       • sudo systemctl daemon-reload
       • sudo systemctl enable led-jukebox-mqtt.service
       • sudo systemctl start led-jukebox-mqtt.service
     • Set LED matrix subscriber
       • sudo cp service/led-jukebox-led-matrix.service /etc/systemd/system/led-jukebox-led-matrix.service
       • sudo systemctl daemon-reload
       • sudo systemctl enable led-jukebox-led-matrix.service
       • sudo systemctl start led-jukebox-led-matrix.service
     • Set Beats publisher as a user service.
       • cp service/led-jukebox-beats.service ~/.config/systemd/user/led-jukebox-beats.service
       • systemctl --user daemon-reload
       • systemctl --user enable led-jukebox-beats.service
       • systemctl --user start led-jukebox-beats.service
     • Auto login setting
       • sudo vim /etc/systemd/system/getty.target.wants/getty@tty1.service

         #ExecStart=-/sbin/agetty -o '-p -- \\u' --noclear - $TERM
         ExecStart=-/sbin/agetty --autologin <your user name> --noclear %I $TERM
         

       • sudo systemctl daemon-reload
       • sudo reboot

5. Renderer Settings

   • LED-Jukebox is rendered using OpenGL.
     • sudo apt-get install -y build-essential python3-dev libgles2-mesa-dev mesa-utils libgbm-dev libdrm-dev xvfb
   • Set gpu_memory in /boot/firmware/config.txt file.
     • sudo vim /boot/firmware/config.txt

       gpu_mem=128
       

   • Install pyopengl and pyopengl-accelerate.
     • Clone the repository.
       • git clone https://github.com/mcfletch/pyopengl.git
       • cd /usr/local/bin/LED-Jukebox
       • source venv/bin/activate
       • cd pyopengl
       • pip install -e .
       • cd accelerate
       • pip install -e .
   • Install python dependencies.
     • pip install -r requirements.txt