Moving Picture Experts Group Audio Layer 3 File. MP3 files are highly compressed audio tracks, and are very popular on the Internet. MP3 files are not programs, and viruses cannot infect them. This file type has the extension MP3.
A compressed digital audio file which permits the transfer of the call for playback. the Internet multimedia computers are typically equipped with audio file players which support MP3 playback (ex. Windows Media Player, iTunes, WinAmp, etc).