What is MP3 music? The music is recorded in CDA format on an audio CD and is of excellent quality. MP3 is a popular type of music file. An MP3 file is a compressed audio file to reduce the file size while maintaining the sound quality. Certain frequencies are removed from the music and when this is done it cannot be completely changed. MP3 is called lossy compression because the date is lost forever. Music files shared and downloaded from the Internet, usually in MP3 format. You will recognize the file type because the extension is .mp3 at the end of the file name. Computers can also use WAV audio files. The operating system reads WAV files for the original music barrier and text messages such as "Have Mail". WAV files are used only for small audio tracks, so you can check their size. You may have heard MIDI audio files, a digital musical environment. These audio files don't sound great, but they do contain information that can be used to control the sound card. Micro