MAD is a high-quality MPEG audio decoder. It currently supports MPEG-1 as well as the MPEG-2 extension to Lower Sampling Frequencies. All three audio layers (Layer I, Layer II, and Layer III a.k.a. MP3) are fully implemented. MAD does not yet support MPEG-2 multichannel audio (although it should be backward compatible with such streams) or AAC, nor does it support the so-called MPEG 2.5 format. This is ID3 tag library, which is part of the project. LICENSE: GPL2 or later WWW: http://mad.sourceforge.net/