How MP3 File Works | MP3 Compression Explained In 3 Minutes

While CD uses an uncompressed, high-resolution format, the goal of MP3 is to compress audio while retaining a sound quality comparable to CD.
Hereβs how it works.
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Some sources & further reading:
computer.howstuffworks.com/mp3.htm
mpgedit.org/mpgedit/mpeg_format/MP3Format.html
en.wikipedia.org/wiki/MP3
en.wikipedia.org/wiki/Lossy_data_compression
en.wikipedia.org/wiki/Psychoacoustics
en.wikipedia.org/wiki/ID3
en.wikipedia.org/wiki/Lossless_compression
en.wikipedia.org/wiki/FLAC
web.archive.org/web/20140705145144/ oreilly.com/catalog/mp3/chapter/ch02.html