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MySelfPlayingXylophone

A homemade self-playing xylophone (actually a glockenspiel) built on a Raspberry Pi 0 WH basis, capable of playing any provided input MIDI files, with an LCD color screen and 3 rotary/click buttons, for interactions (e.g. select file).

This repository gathers sources Python scripts to be executed on the Raspberry Pi.

You can see the result at work with this playlist:

https://www.youtube.com/playlist?list=PLDA98d1k4czCp31zG0Rtx2t4uluENyvoJ

How to setup the Raspberry Pi for this project

  • From a fresh install, update the whole Pi:

    • sudo apt-get update
    • sudo apt-get upgrade

  • Enable SSH, SPI & I2C interfaces:

    • sudo raspi-config
    • -> 3 Interface Options
    • -> P2 SSH -> Yes
    • -> P4 SPI -> Yes
    • -> P5 I2C -> Yes
    • sudo reboot

  • Disable Desktop environment:

    • sudo raspi-config
    • -> 1 System Options
    • -> S5 Boot / Auto Login
    • -> B2 Console Autologin
    • sudo reboot

  • Install PIGPIO library for Python:

    • sudo pip3 install pigpio

  • In case it's not already installed, install smbus2 I2C library for Python:

    • sudo pip3 install smbus2

  • Setup I2C bus to its maximum speed:

    • sudo vi /boot/config.txt
    • -> dtparam=i2c_arm=on,i2c_arm_baudrate=400000 (modify the original line, that was 'dtparam=i2c_arm=on')
    • sudo reboot

  • Disable bluetooth (not needed):

    • sudo systemctl disable hciuart.service
    • sudo systemctl disable bluetooth.service
    • sudo vi /boot/config.txt (add the following line at the very bottom of the file)
    • -> dtoverlay=disable-bt
    • sudo reboot

  • In case it's not already installed, install SPI library for Python:

    • sudo pip3 install spidev

  • In case it's not already installed, install Python Imaging Library (PIL-low):

    • sudo pip3 install Pillow

  • In case it's not already installed, install Numpy library for Python:

    • sudo pip3 install numpy

  • Install mido MIDI library for Python:

    • sudo pip3 install mido

  • Manually start PIGPIO daemon (add this to rc.local or .bashrc or other):

    • sudo pigpiod

Note: so, pigpio is used for GPIO access. Though they are available/activable in this project, RPi.GPIO & gpiozero supports were only partially tested.

  • Add xylophone's main script to the Raspberry Pi startup sequence:

    • sudo vim /etc/rc.local (add the following lines before final "exit 0" command)
    • -> cd /home/pi/xylo
    • -> sudo ./main.sh 2>&1 > /dev/null &