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.

MAD has the following special features:

  - 24-bit PCM output
  - 100% fixed-point (integer) computation
  - completely new implementation based on the ISO/IEC standards
  - distributed under the terms of the GNU General Public License (GPL)

The software is distributed as a library (libmad) and command-line
front-end (madplay).

WWW: http://mad.sourceforge.net/