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Mp3 is said to be a patented digital audio encoding format. It is a very general audio format using a form of loose data compression. Mp3 is a very common audio format for consumer audio storage as well as a factor standard of digital audio compression for transfer and playback of music on digital audio players. MP3 is an audio specific format that was first designed by the Moving Picture experts group and later by many companiesA MP3 is designed to decrease the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for the listeners. The Mp3 file is created using the setting of 128 kbit/s which will result in a file 11 times smaller than the CD file created from the original source. A mp3 file can be created at very higher or lower rates, wit easy guitar songs h higher or lower bit rates which results in higher and lower quality.This type of compression works by reducing accuracy of sound that is considered to beyond the auditory resolution ability of most of the listeners. This method is known as perpetual coding. It basically utilizes psychoacoustic models to discard or reduce precision of components less audible to human hearing, and then record the remaining information in an efficient manner. Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal.After 1994 mp3 files began to spread on the internet. The popularity of Mp3 increased with the advent of Null soft audio player and Win amp in the year 1997. You can even download mp3 from various websites available on internet.