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  1. 1. How MP3 Music Files Work What is MP3 The feature of MP3 About the MP3 player The factor by which MP3 spread Reference
  2. 2. What is MP3  MP3 is an abbreviated designation of "MPEG-1 Audio Layer 3".  It is a common audio format for consumer audio stor- age, as well as a de facto standard of digital audio compression for the transfer and playback of music on digital audio players. Hi-tech MP3 shoes
  3. 3. The feature of MP3  Disassembly becomes easy for the data which I com- pressed from decrease of the size.  It is easy to transfer on telecommunication line.  It is used with Internet radio widely.  There can be the thing used for unjust distribution of the musical piece that a copyright holder does not ac- cept a redistribution.
  4. 4. About the MP3 player  It is a thing corre- sponding to the MP3 from a portable music player.  The player who had a large-capacity HDD built-in can record music more than 10,000 pieces.  The MP3 CD can play a CD Player or the DVD player of the support model.
  5. 5. The factor by which MP3 spread  Because free encoder decoder software is available.  German Fraunhofer - Gesellschaft company and French Thomson company are insisting on posses- sion of a license after 1998.  But because a free encoder of LAME and free revival software of Windows Media Player were available. It spread wasn't disturbed.
  6. 6. Reference  isofter   Wikipedia 