Rubber Band Library

Licensing

From version 1.8.0, the Rubber Band Library is published in a single edition with dual licensing.

Previous versions were released in two editions: a GPL edition and a commercial edition. These editions had different code and supported different build environments. The licences themselves are broadly unchanged for 1.8.0, but now you get the same code either way. This makes the GPL edition more flexible, and also makes developing commercial applications easier because you can evaluate the library using the full power of the commercial edition before you buy.

Using Rubber Band Library in open source applications

When you receive a copy of Rubber Band Library—whether by downloading it, pulling it from our repository, copying it from a friend, or by any other means—you're getting it under the terms of the GNU General Public License (version 2 or later).

That means you get the source code and also the right to modify and redistribute it, provided you do so under the terms of the GPL. That is, your application must also be Free Software and you must provide source code for it.

We like Free Software, but be warned that you aren't allowed to publish it through certain distribution channels. For example, you can't legally distribute code under this licence on the iOS or OS/X App Stores, or in the form of VST plugins. Both of these are controlled by companies that impose restrictions on what sort of software they allow.

Using Rubber Band Library in proprietary commercial applications

For commercial software development, we provide a very simple and flexible licence which allows you to take the Rubber Band Library code, modify it if desired, and redistribute it in proprietary products.
No expiry date, no royalties.

Interested? Read more and buy here.