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Mp3(mpeg layer-3 ) and Mp4( mpeg layer-4 ) are both audio compression formats. These two format of audio compression are based on psycho acoustic compression techniques. While they are similar in the history they share, MP4 has done much to progress beyond the common ground that led up to MP3.

Mp3 has gained popularity because of their revolutionary compression capacity. Users were able to compress audio to sizes that were manageable for internet transfer. There are some limitations to MP3 that are insurmountable some have been addressed in later compression formats. These include occurrences particular to echoes and other instances that involve irregular audio. This is a result of the algorithms that are used in the compression technique. Mp3 is based on a compression technique that removes audio data of sound that is not commonly audible to the human ear. The result is a small file size and audio that seems equal in quality to many.