The Basics MP3 is an online music file format that allows for major compression, making it easy to distribute music over the Net at rapid-fire pace. The quality of the sound is comparable to listening to a CD, and it's damn fast to download. It takes less than five minutes to download a full-length song as an MP3 file. Plus, they're the perfect portable. A Few Bummers Depending on memory size, you can run out of space pretty fast when you download files onto your player.
More memory means more music.
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