iPod shuffle may not play AAC files that weren‘t encoded with iTunes

If you try to play a song on iPod shuffle that was encoded in AAC format (.M4A) by a third-party application, iPod shuffle may not play it and skip to the next song. To prevent this from happening, always use iTunes to encode songs to AAC for iPod shuffle play.

Songs purchased from the iTunes Store (.M4P and .M4B files) are not affected by this.

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