Support for various streaming formats

The AAC (Advanced Audio Coding) format was chosen as the primary file format by Apple for the iPod as well as in iTunes. The AAC+, also called HE AAC, is an improved version of the AAC audio codec, followed by another version called HE AAC v2.

We recommend using AAC+ over MP3: a 32 kbps AAC+ stream has a quality that is slightly lower than a 128 kbps MP3 stream and a far higher quality to a 62 kbps MP3 stream.