Software Licenses & EULA

Free and Open Source Software Declarations
KLANG uses free and open source software. Please see below for the open source packages used and their respective licenses. Information about which license texts and copyright notices refer to which source code can be taken directly from the source code we provide according to the written offer below.

This KLANG product includes software code developed by third parties, including software code subject to the GNU General Public License (“GPL”) and GNU Lesser General Public License (“LGPL”). As applicable, the terms of the GPL and LGPL, and information on obtaining access to the GPL code and LGPL code used in this product, are available to you in this document.

Modifications of our software that is linked with libraries licensed under the LGPL are herewith permitted for the user’s own use and reverse engineering for debugging such modifications. However, forwarding the information acquired during reverse engineering or debugging to third parties is not permitted. Furthermore, it is not permitted to distribute modified versions of our proprietary software. Please note that there is no warranty for any defects based on your modifications.

At the request of the copyright holders of the GPL and LGPL components, we refer to the following: Our programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License, the GNU Lesser General Public License and the other applicable licenses for more details.

KLANG Free and Open Source Software (FOSS) Declaration and Licenses for KLANG immersive processors and KLANG:app: Download KLANG license.txt and KLANTE (KLANG’s Dante Module) Download license

Details and Links for some packets:

OpenDaff: Link – Download license

kissFFT: Link – Download license

oscpkt: Link – Download license

dRowAudio: Link – Download license

uBoot – Download license

Linux – Download license

Busybox – Link – Download license

GDB – Link – Download license

FPGA_CTRL – Download license

DSPlib –  Download license

Mathlib –  Download license

wb_i2c_slave – Download license

KLANTE – Download license

This is just an excerpt, please refer to the full list provided in the introductory paragraph above.


Certain FOSS licenses require KLANG to make available to recipients the source code corresponding to the FOSS binaries distributed under those licenses. Where such specific license terms entitle you to the source code of such software, KLANG will provide to anyone upon written request via e-mail and/or traditional paper mail within three years after the distribution of the product by us the applicable source code via CD-ROM or USB pen drive for a nominal cost to cover shipping and media charges as allowed under the GPL and LGPL.

Please direct all inquiries via email to, or contact us via mail at
KLANG:technologies GmbH
FOSS Requests
Wespienstr. 8-10
52062 Aachen

For your convenience you may also check if the requested source code is available on

This offer is valid to anyone in receipt of this information.

End User Licence Agreements – EULA

You can find our EULAs (End User Licence Agreements) for both our Firmware & Updates and for our Free Software by clicking here: