MP3 was a revolution when it entered the audiophile world. Not entirely a good revolution, in my opinion, but nevertheless something that changed the world of sound. Because of MP3's obvious lack of quality, other formats have been developed, but... well..., apart from WMA, not with too much commercial success. This has left the vast majority of consumers in a dark corner: Either settle with low quality, or purchase the original recording (if you can find it). Now this may change!
MP3HD is a lossless compression of an ingenious kind. It consists of two layers. The top layer is a normal lossy MP3 layer, and the bottom layer contains all the missing details. Meaning that MP3HD can be played on
all MP3 players, but only the lossless details will come forth via a new MP3HD player.
That is SMART! :-)
Average bit-rate will typical be between 475 and 875 kbit/s
mp3HD Overview
* mp3HD is a lossless audio codec (100% bit-exact replica of CD tracks)
* Backward Compatible to mp3
* File extension .mp3
* Bitrates for music approximately 500 to 900 kbps rates (similar to other lossless codecs), depending on genre
* Embedded mp3 track and the mp3HD file share the same id3 metadata
* Encoding parameters (e.g. bit rate), ancillary data and meta data of embedded mp3 track are under control
You can get the de- & encoder, and 'toolkit'
via http://www.all4mp3.c.../Learn_mp3_hd_1.aspx at http://www.all4mp3.com/SoftwareHD.aspx For 32-bits Mac, Linux, and Windows,
- but 64 bits and Windows 7 (Seven) are
not listed!

The following tools are available immediately for your tests:
* Encoding
o Command-line encoder
* Decoding (to wav)
o Command-line decoder
* Playing
o Plug-in for Winamp (for Winamp 5.5 and above)
* Platforms
o Win32 (Microsoft Windows XP, 2000, NT 4, Me/98), Vista
o Linux32
o Mac OS X
* Support
o CD audio (PCM): 44.1, 48 kHz sampling rate, 16 bit/sample
This page also has a few audio files with the new encoding
- average download speed: 370 KB/s