Hauer On Repeat

What is twelve tone music?

Twelve tone music is a concept founded by Josef Matthias Hauer, that creates music from random numbers.

To generate twelve tone music you follow an algorithm which takes numbers as an input and outputs the corresponding music.

For more information on twelve tone music read this.

Exhibition Landesausstellung 2019

This is the source code for the hauer_on_repeat exhibit that will be showcased at the Niederösterreichische Landesausstellung 2019.

The exhibit is created by students from HTL Wiener Neustadt in collaboration with Josef Matthias Hauer Musikschule and the Landesausstellung 2019 team.

How does the hauer_on_repeat exhibit work?

The user can select the twelve numbers by activating twelve sensors in any order. A raspberry pi will then create a Monophony from these numbers, display the notes on a display, play the music and upload an mp3 of the music to a social media platform. Each tune will also be stored in a database.

Prerequisites:

firefox

sudo apt-get install firefox

To enable communication between the c++ code and the browser the following configuration has to be changed:

• open firefox and go to about:config
• search for the privacy.file_unique_origin setting
• change the value to be false

lilypond

LilyPond Download can be found here

timidity++

If you are using Ubuntu:

sudo apt-get install timidity

If you prefer Manjaro:

pacman -S timidity++

If you have a SoundFont preinstalled skip the rest.

Else:

pacman -S soundfont-fluid

To get the SoundFont into Timidity edit the config file /etc/timidity++/timidity.cfg and add

dir /usr/share/soundfonts/
soundfont FluidR3_GM.sf2

The first path specifies where the SoundFont files (FluidR3_GM.sf2) are located.

The second line specifies the SoundFont you want to use.

gtest

Installation guide to gtest on Ubuntu here

References

GPIO Code from

http://hertaville.com/introduction-to-accessing-the-raspberry-pis-gpio-in-c.html