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Part II: iPod: The Software > Digital Audio Formats

3. Digital Audio Formats

Recorded music has appeared in a variety of shapes and sizes over the decades, including fragile discs spinning at 78 rpm, vinyl records in colorful sleeves that were artworks in themselves, pocket-size cassette tapes, and futuristic-looking compact discs. But no music format ever exploded into the public consciousness as quickly and widely as the bits of computer code known as MP3 files.

The MP3 format makes it possible to compress a song into a file small enough to be uploaded, downloaded, emailed, and stored on a hard drive. That feat of smallness set off a sonic boom in the late 1990s that continues to reverberate across the music world today.


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