Unusually, both the Hillsborough single and the X Factor song were available on CD - increasingly a rarity in an era when downloads account for 99% of all single sales.

BBC: Hillsborough single is Christmas number one

Apt-X is a unique codec that reproduces robust sound that's true-to-life, providing CD quality audio, regardless of file compression encoding.

ENGADGET: Altec Lansing's inMotion Air speaker system streams from just about anywhere