MP3 is compression format, designed to greatly reduce amount of data required by audio, yet still have quality like faithful production to the most of human ear. This MP3 was invented by European engineers who work on EUREKA 147 DAB digital radio research program. This format was standardized by ISO/IEC in 1991.
Today this is the most popular audio format of the world. The recording process will discard portions of data audio considered not important to human ear. So, generally, producing audios with quality almost like faithful production, but the size is greatly reduced. So we should not be foolish by compressing MP3 when we feel that data travelers can not carry them. This MP3 is a compressed one.
MP3 is enjoying popularity not only from end users and software, but also portable media player like mp3 player, dvd or cd player, etc. I barely remember when did I ever saw people bring walkman. Now there are only mp3 player which is also fading replaced by ipod.
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