Make sure to check all of these out though because they are all different and do different things. IF you do decide to buy one then these are the ones to buy though. If you just like music then check out the links at the bottom of this page. They are cool. So you have looked at the mp3 players and you want me to explain it.
Lets start with the most common question.
The human hearing range is between 20Hz to 20Khz and it is most sensitive between 2 to 4 KHz. MP3 models and other techniques tries to eliminate the frequencies which the human ear is unable to hear, keeping all the hearing frequencies, leaving intact the hearing experience. As a result the MP3 compression form is destructive. That means that the compression causes the file to lose some information so that it cannot be restored to its original content. The larger the compressed file the better the audio quality of the result.