Mp3 is a file format which stores audio files on a computer in such a way that the file size is relatively small but the song sounds near perfect. You can identify MP3 files because theywill end in mp3. Typically 1 MB is equal to one minutes of music or several minutes for spoken work/audio books.
MP3 is simply a file format. However, it can be used either legally or illegally. Using an MP3 is legal if the song's copyright holder has granted permission to download and play the song. Also, it is legal to make copies from CD for personal use. However it is illegal to encode MP3 from CD and teade them without permission from the copyright holder.
Well, There are many web site you can find and search for mp3 there. Both of legal and illegal (hehe).Here's some of web site that you can find it!
English Song
Thai Song
