How We Do MP3 - The Technology of MP3 Players
How we do MP3 is fairly simple, though there's a lot going on inside the player.
The music we hear is analog sound waves and must be converted to digital. A raw
digital file containing all sounds is a WAV file. But it's so large, we would
only be able to store a few songs in our player's memory.
How we're able to save more music in the memory is to compress the
raw data, discarding sounds not audible to the human ear. This is done using
Codecs like MP3 and WMA that create a file less than 1/10 the original WAV file's
size.
Then for play-back the file is decompressed, converted back to analog,
amplified, and sent to the headphones. And amazingly, all of this can be
accomplished in a tiny device that's smaller than a pack of gum.
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