Hi I noticed that this page is very out of date and in by keeping within the interest and spirit of free open information corrections should be made. Below is the relevant link. http://flac.sourceforge.net/comparison.html It mentions ALAC source code as unavailable and proprietary. The move top open source occurred on 08/11. Please see http://alac.macosforge.org and http://alac.macosforge.org/trac/browser for more. The Apple Lossless Audio Codec sources are available under the Apache license. Details can be found here http://www.apache.org/licenses/LICENSE-2.0. Kindest regards Alex