1. How MP3 Music
Files Work
・MP3
・MP3 Ripper
・MP3 Player

2. MP3
MPEG-1 Audio Layer 3, more commonly referred
to as MP3, is a digital audio encoding format using
a form of lossy data compression.
It is a common audio format for consumer audio
storage, as well as a de facto standard encoding
for the transfer and playback of music on digital
audio players.

3. MP3 Ripper
Ripper is a tool used for the ripping.
Ripping is the process of copying audio or video
content to a hard disk, typically from removable
media or media streams

4. MP3 Player
MP3 player is an audio player.
Ripping is the process of copying audio or video
content to a hard disk, typically from removable
media or media streams

5. Example of MP3 Player

6. References
・wikipedia
http://ja.wikipedia.org/
・Yahoo!
http://www.yahoo.co.jp/