QandAs: Tech

What is an MP3 file?

Answer:
MP3 is a data encoding format used largely for recording and playback of audio information. The

term MP3 is really a shortcut term that represents MPEG-1, Audio Layer 3. MPEG is an acronym for the Moving Picture Experts Group; credited with the origin of this audio encoding format.

MPEG-1 is an accepted standard for the lossy data compression method, which may result in a change in the data upon retrieval and playback. Audio Layer 3 basically means third generation codecs for audio filtering, sampling, and other attribute protocols. MPEG-1 compression reduces audio file size to about one-twelfth the size of their corresponding WAV (Waveform) files.

Because human hearing cannot detect certain frequencies and other sound attributes, the MPEG-1 lossy compression method relies on being just good enough; essentially eliminating all unnecessary sound (because we cannot hear it anyway), rather than attempting to encode all the deepest nuances and subtleties of music and other audio.

To capture all the digital data of music and other audio, billions of information bits are required, which, of course, creates large and cumbersome files; thus the beauty and effective, efficient functionality of the MP3 audio encoding format.