Thank you for contributing to the Mixxx project!

In order to distribute your changes with Mixxx, we need a record of your permission to distribute them under Mixxx's license.

Mixxx is distributed under the GNU General Public License Version 2 (the GPLv2). The full text of the GPLv2 can be found at [1]. Because a significant number of Mixxx downloads are through the Mac OS X App Store, we also license Mixxx under the GPLv2 with a special "App Store Exception". For more details on GPL exceptions, see [2].

The text of the Mixxx App Store Exception is as follows:

13. In addition, as a special exception, you are granted the additional
right to distribute this Program subject to the Mac App Store Product
Usage Rules and Licensed Application End User License Agreement,
if the source code is made available on the Mixxx Website under the
terms of the GPL.

By submitting this form, you agree to the following terms for your present and future contributions to Mixxx:

* You retain the copyright on your contribution but give Mixxx irrevocable permission to distribute your contribution under the above license. We will contact you to obtain your permission to change the license terms of your contributions. You agree that if we cannot reach you within 30 days by the email address you provide below then you permit Mixxx to re-license your contributions without your explicit permission.

* You represent that you are legally entitled to grant the above license. If your employer has the rights to your contributions, you represent that you have permission from your employer to grant the above license.

* You represent that each of your contributions is your original creation.

* You represent that your contribution includes complete details of any third-party license or other restriction (including, but not limited to, related patents and trademarks) of which you are personally aware and which are associated with any part of contributions.

* You grant to Mixxx and to recipients of Mixxx a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer your contributions.

* Your contribution is provided without warranty of any kind.

[1] http://www.gnu.org/licenses/gpl-2.0.html
[2] http://www.gnu.org/licenses/old-licenses/gpl-2.0-faq.html