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Latest commit 2b9efe8 Jul 14, 2017
Failed to load latest commit information. Update Jul 2, 2017
hardware added missing box files Jul 2, 2017
pi setup additions Jul 14, 2017 setup additions Jul 14, 2017


This repo currently contains a circuit based on this design posted on Silicon Stuff for using the Raspberry Pi built in uart as a midi output.

Setting up midi on the Raspberry Pi

The files in boot need to go in /boot (probably good idea to compare with existing rather than copying them over). The relevant part of config.txt is:


Build and install ttymidi - this is adapted to allow sysex messages to pass through correctly.

$ cd pi/ttymidi
$ make
$ sudo make install

Autostarting Midimutant on Raspberry Pi

Based on LXDE window manager

  1. Copy midimutant.desktop to /home/pi/Desktop

This tells the window manager how to start the application.

  1. Create a local startup for the pi user by copying contents of dot-config to .config in /home/pi

This autostarts the application and a terminal in the background so you can still plug in a keyboard and alt-tab to it to escape the fullscreen app.

  1. Copy to /home/pi

This is the shell script that starts ttymidi, connects it to the output alsa midi device and starts midimutant.

To make the application fullscreen with no window decoration, add this to /home/pi/.config/openbox/lxde-pi-rc.xml in the section:

<application name="midimutant">
  1. Turn off the mouse pointer

Doing the properly for touchscreen was tricky to figure out (unclutter etc show the mouse when it moves). Edit /etc/lightdm/lightdm.conf search for the xserver-command option and uncomment it to be this:

xserver-command=X -nocursor