MySelfPlayingXylophone

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MySelfPlayingXylophone

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A Homemade Self-Playing Xylophone based on Raspberry Pi

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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 &

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