MAD - High-quality fixed-point MPEG audio decoder with 24-bit output
Version: 0.15.2 BetaMAD is a high-quality fixed-point MPEG audio decoder with 24-bit output. The implementation is entirely new, based on the ISO/IEC standards, and performs especially well on systems without native floating-point support.
Operating System: Mac OS X
It currently supports MPEG-1 and the MPEG-2 extension to lower sampling frequencies, as well as the de facto MPEG 2.5 format. All three audio layers - Layer I, Layer II, and Layer III (i.e. MP3) - are fully implemented.
MAD does not yet support MPEG-2 multichannel audio (although it should be backward compatible with these types of streams) nor does it currently support AAC.
Because MAD provides full 24-bit PCM output, applications using MAD are able to produce exceptionally high quality audio. Even when the output device supports only 16-bit PCM, applications can use the extra resolution to increase the audible dynamic range through the use of dithering or noise shaping.
Because MAD uses integer computation rather than floating point, it is well suited for architectures without a floating point unit. All calculations are performed with a 32-bit fixed-point integer representation.
Because MAD is a new implementation of the ISO/IEC standards, it is unencumbered by the errors of other implementations. MAD is not a derivation of the ISO reference source or any other code. Considerable effort has been expended to ensure a correct implementation, even in cases where the standards are ambiguous or misleading.
Here are some key features of "MAD":
· 24-bit PCM output
· 100% fixed-point (integer) computation
· Completely new implementation based on the ISO/IEC standards
· Available under the terms of the GNU General Public License (GPL)