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A multi-channel and hi-res capable audio file editor
Java HTML SuperCollider Other
branch: master



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Eisenkraut is a standalone, cross-platform audio file editor using the SuperCollider 3 server application.

Eisenkraut is (C)opyright 2004–2015 by Hanns Holger Rutz. All rights reserved. It is released under the GNU General Public License.

To contact the author, send an email to contact at For project status, API and current version visit


A binary version of Eisenkraut for Linux, OS X and Windows is provided through Bintray.

setting up and running

Eisenkraut uses the SuperCollider server as the audio playback engine. You need to install a recent SuperCollider 3 version to run this software. The recommended version is SuperCollider 3.6.3 or newer. On Linux Debian, you should be fine with sudo apt-get install supercollider.

To launch Eisenkraut, you can use the Eisenkraut.command shell script. On a Linux desktop system, you may copy Eisenkraut.desktop to ~/.local/share/applications in order to be able to place Eisenkraut in your desktop's application bar. Make sure you open this file with a text editor and change paths in the Exec and Icon entries to match your installation location. Future versions will hopefully provide an automatic installation procedure to do that work for you. Installing the .desktop file means you can open sound files directly from the desktop or file manager (Nautilus).

After launching Eisenkraut for the first time, make sure that the "SuperCollider Server (scsynth)" field in the audio preferences is pointing to the valid scsynth or scsynth.exe (on Windows) file! On OS X, newer SuperCollider versions "hide" the scsynth command line tool inside the bundle. So the correct path will be something like /Applications/SuperCollider/

Also note that, by default, the audio server is not automatically booted, so you need to press the "Boot" button in the main window to launch the server and be able to actually hear the sound file when playing it back. There is a preferences switch to enable automatic booting.


Eisenkraut can be build from source with sbt version 0.13. It requires Java 1.6, and library dependencies are currently included as jars in the lib folder.

If you do not have or wish to install sbt on your system, a shortcut is to use the provided Unix (OS X and Linux) script sbt which comes in the main folder. It may be invoked as ./sbt and will automatically download the correct sbt-launch.jar version and place it in the main Eisenkraut directory, the first time it is executed.

To build on Linux or Windows:

$ sbt assembly

The result will be Eisenkraut.jar. This should be double-clickable, and otherwise can be launched with java -jar Eisenkraut.jar. The preferred way, however, is to use the Eisenkraut.command shell script which will give the application more memory.

To build on OS X:

$ sbt appbundle

The result will be in the main directory.

source code distribution

Eisenkraut's GPL'ed source code is made available through

As a SuperCollider client it uses the JCollider library, which is also licensed under the GNU General Public License. The compiled library is included, for source code and details visit

For OSC communication, the NetUtil library is used, which is licensed under the GNU Lesser General Public License (LGPL), for source code and details visit

It uses the ScissLib library which is licensed under the GNU General Public License, source code provided through, and Steve Roy's MRJAdapter published under the Artistic License, source code provided through

ICU4J and Unicode Java code (Normalizer.jar) is used which is licensed under a BSD 3-clause type license.


Please refer to the help/index.html file for a list of manual topics.

A short screencast is available on Vimeo.


A lot. Here are some suggestions:

  • Still need to integrate FScape (more a job about FScape than about Eisenkraut)
  • Finding a way to edit with simultaneous video display (might be a separate app synchronized through some kind of OSC transport)
  • Optionally saving meta-information with the sound files (e.g. a separate XML file), like panorama settings, window bounds etc.
  • Finishing sonogram functionality (needs decimation and must be editable)
  • Improving SuperCollider interface and classes
  • etc. etc.
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