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Reference to Wavpack removed, since it uses only public domain technologies

From the Wavpack website:

WavPack employs only well known, public domain techniques (i.e., linear prediction with LMS adaptation, Elias and Golomb codes) in its implementation. Methods and algorithms that have ever been patented (e.g., arithmetic coding, LZW compression) are specifically avoided. This ensures that WavPack encoders and decoders will remain open and royalty-free.

Additionally, I have confirmed with one of the developers that this status is current.

--Alexanderino (talk) 01:05, 1 November 2014 (UTC)