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Which Song Formats Work with Your iPod?

If you’re wondering how you can actually fit thousands of songs on a tiny iPod, it all comes down to this—compression. The songs you download onto your iPod are in MP3 format (which is a music compression technique that makes the file size of your songs fairly small, while maintaining nearly CD quality). While the iPod is probably most widely known as an MP3 player, it actually also supports the AAC format, a music format growing rapidly because of its higher-quality sound and smaller file sizes. All songs you buy from the iTunes Music Store come in this new AAC format. (Note: There are two AAC formats: the protected AAC M4P, which is encrypted to prevent music piracy; and the unprotected AAC M4A, which is typical of imported audio CD files.)

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